Update vendor (#1297)

6 files changed, 300 insertions, 270 deletions

diff --git a/vendor/github.com/gomarkdown/markdown/README.md b/vendor/github.com/gomarkdown/markdown/README.md
index 5488280c..095db307 100644
--- a/vendor/github.com/gomarkdown/markdown/README.md
+++ b/vendor/github.com/gomarkdown/markdown/README.md
@@ -6,11 +6,7 @@ Package `github.com/gomarkdown/markdown` is a very fast Go library for parsing [
 
 It's fast and supports common extensions.
 
-## Installation
-
-    go get -u github.com/gomarkdown/markdown
-
-API Docs:
+## API Docs:
 
 - https://godoc.org/github.com/gomarkdown/markdown : top level package
 - https://godoc.org/github.com/gomarkdown/markdown/ast : defines abstract syntax tree of parsed markdown document
diff --git a/vendor/github.com/gomarkdown/markdown/ast/node.go b/vendor/github.com/gomarkdown/markdown/ast/node.go
index e6fcba9a..9d2422af 100644
--- a/vendor/github.com/gomarkdown/markdown/ast/node.go
+++ b/vendor/github.com/gomarkdown/markdown/ast/node.go
@@ -250,11 +250,12 @@ type Del struct {
 type Link struct {
 	Container
 
-	Destination []byte // Destination is what goes into a href
-	Title       []byte // Title is the tooltip thing that goes in a title attribute
-	NoteID      int    // NoteID contains a serial number of a footnote, zero if it's not a footnote
-	Footnote    Node   // If it's a footnote, this is a direct link to the footnote Node. Otherwise nil.
-	DeferredID  []byte // If a deferred link this holds the original ID.
+	Destination          []byte   // Destination is what goes into a href
+	Title                []byte   // Title is the tooltip thing that goes in a title attribute
+	NoteID               int      // NoteID contains a serial number of a footnote, zero if it's not a footnote
+	Footnote             Node     // If it's a footnote, this is a direct link to the footnote Node. Otherwise nil.
+	DeferredID           []byte   // If a deferred link this holds the original ID.
+	AdditionalAttributes []string // Defines additional attributes to use during rendering.
 }
 
 // CrossReference is a reference node.
diff --git a/vendor/github.com/gomarkdown/markdown/html/callouts.go b/vendor/github.com/gomarkdown/markdown/html/callouts.go
deleted file mode 100644
index e377af22..00000000
--- a/vendor/github.com/gomarkdown/markdown/html/callouts.go
+++ /dev/null
@@ -1,42 +0,0 @@
-package html
-
-import (
-	"bytes"
-	"io"
-
-	"github.com/gomarkdown/markdown/ast"
-	"github.com/gomarkdown/markdown/parser"
-)
-
-// EscapeHTMLCallouts writes html-escaped d to w. It escapes &, <, > and " characters, *but*
-// expands callouts <<N>> with the callout HTML, i.e. by calling r.callout() with a newly created
-// ast.Callout node.
-func (r *Renderer) EscapeHTMLCallouts(w io.Writer, d []byte) {
-	ld := len(d)
-Parse:
-	for i := 0; i < ld; i++ {
-		for _, comment := range r.opts.Comments {
-			if !bytes.HasPrefix(d[i:], comment) {
-				break
-			}
-
-			lc := len(comment)
-			if i+lc < ld {
-				if id, consumed := parser.IsCallout(d[i+lc:]); consumed > 0 {
-					// We have seen a callout
-					callout := &ast.Callout{ID: id}
-					r.callout(w, callout)
-					i += consumed + lc - 1
-					continue Parse
-				}
-			}
-		}
-
-		escSeq := Escaper[d[i]]
-		if escSeq != nil {
-			w.Write(escSeq)
-		} else {
-			w.Write([]byte{d[i]})
-		}
-	}
-}
diff --git a/vendor/github.com/gomarkdown/markdown/html/esc.go b/vendor/github.com/gomarkdown/markdown/html/esc.go
deleted file mode 100644
index 89ec9a27..00000000
--- a/vendor/github.com/gomarkdown/markdown/html/esc.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package html
-
-import (
-	"html"
-	"io"
-)
-
-var Escaper = [256][]byte{
-	'&': []byte("&amp;"),
-	'<': []byte("&lt;"),
-	'>': []byte("&gt;"),
-	'"': []byte("&quot;"),
-}
-
-// EscapeHTML writes html-escaped d to w. It escapes &, <, > and " characters.
-func EscapeHTML(w io.Writer, d []byte) {
-	var start, end int
-	n := len(d)
-	for end < n {
-		escSeq := Escaper[d[end]]
-		if escSeq != nil {
-			w.Write(d[start:end])
-			w.Write(escSeq)
-			start = end + 1
-		}
-		end++
-	}
-	if start < n && end <= n {
-		w.Write(d[start:end])
-	}
-}
-
-func escLink(w io.Writer, text []byte) {
-	unesc := html.UnescapeString(string(text))
-	EscapeHTML(w, []byte(unesc))
-}
-
-// Escape writes the text to w, but skips the escape character.
-func Escape(w io.Writer, text []byte) {
-	esc := false
-	for i := 0; i < len(text); i++ {
-		if text[i] == '\\' {
-			esc = !esc
-		}
-		if esc && text[i] == '\\' {
-			continue
-		}
-		w.Write([]byte{text[i]})
-	}
-}
diff --git a/vendor/github.com/gomarkdown/markdown/html/renderer.go b/vendor/github.com/gomarkdown/markdown/html/renderer.go
index 01e0deec..6c56ac12 100644
--- a/vendor/github.com/gomarkdown/markdown/html/renderer.go
+++ b/vendor/github.com/gomarkdown/markdown/html/renderer.go
@@ -3,6 +3,7 @@ package html
 import (
 	"bytes"
 	"fmt"
+	"html"
 	"io"
 	"regexp"
 	"sort"
@@ -10,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/gomarkdown/markdown/ast"
+	"github.com/gomarkdown/markdown/parser"
 )
 
 // Flags control optional behavior of HTML renderer.
@@ -125,13 +127,60 @@ type Renderer struct {
 	headingIDs map[string]int
 
 	lastOutputLen int
-	disableTags   int
+
+	// if > 0, will strip html tags in Out and Outs
+	DisableTags int
 
 	sr *SPRenderer
 
 	documentMatter ast.DocumentMatters // keep track of front/main/back matter.
 }
 
+// Escaper defines how to escape HTML special characters
+var Escaper = [256][]byte{
+	'&': []byte("&amp;"),
+	'<': []byte("&lt;"),
+	'>': []byte("&gt;"),
+	'"': []byte("&quot;"),
+}
+
+// EscapeHTML writes html-escaped d to w. It escapes &, <, > and " characters.
+func EscapeHTML(w io.Writer, d []byte) {
+	var start, end int
+	n := len(d)
+	for end < n {
+		escSeq := Escaper[d[end]]
+		if escSeq != nil {
+			w.Write(d[start:end])
+			w.Write(escSeq)
+			start = end + 1
+		}
+		end++
+	}
+	if start < n && end <= n {
+		w.Write(d[start:end])
+	}
+}
+
+func escLink(w io.Writer, text []byte) {
+	unesc := html.UnescapeString(string(text))
+	EscapeHTML(w, []byte(unesc))
+}
+
+// Escape writes the text to w, but skips the escape character.
+func Escape(w io.Writer, text []byte) {
+	esc := false
+	for i := 0; i < len(text); i++ {
+		if text[i] == '\\' {
+			esc = !esc
+		}
+		if esc && text[i] == '\\' {
+			continue
+		}
+		w.Write([]byte{text[i]})
+	}
+}
+
 // NewRenderer creates and configures an Renderer object, which
 // satisfies the Renderer interface.
 func NewRenderer(opts RendererOptions) *Renderer {
@@ -384,25 +433,28 @@ func skipParagraphTags(para *ast.Paragraph) bool {
 	return tightOrTerm
 }
 
-func (r *Renderer) out(w io.Writer, d []byte) {
+// Out is a helper to write data to writer
+func (r *Renderer) Out(w io.Writer, d []byte) {
 	r.lastOutputLen = len(d)
-	if r.disableTags > 0 {
+	if r.DisableTags > 0 {
 		d = htmlTagRe.ReplaceAll(d, []byte{})
 	}
 	w.Write(d)
 }
 
-func (r *Renderer) outs(w io.Writer, s string) {
+// Outs is a helper to write data to writer
+func (r *Renderer) Outs(w io.Writer, s string) {
 	r.lastOutputLen = len(s)
-	if r.disableTags > 0 {
+	if r.DisableTags > 0 {
 		s = htmlTagRe.ReplaceAllString(s, "")
 	}
 	io.WriteString(w, s)
 }
 
-func (r *Renderer) cr(w io.Writer) {
+// CR writes a new line
+func (r *Renderer) CR(w io.Writer) {
 	if r.lastOutputLen > 0 {
-		r.outs(w, "\n")
+		r.Outs(w, "\n")
 	}
 }
 
@@ -426,11 +478,12 @@ func headingCloseTagFromLevel(level int) string {
 }
 
 func (r *Renderer) outHRTag(w io.Writer, attrs []string) {
-	hr := tagWithAttributes("<hr", attrs)
-	r.outOneOf(w, r.opts.Flags&UseXHTML == 0, hr, "<hr />")
+	hr := TagWithAttributes("<hr", attrs)
+	r.OutOneOf(w, r.opts.Flags&UseXHTML == 0, hr, "<hr />")
 }
 
-func (r *Renderer) text(w io.Writer, text *ast.Text) {
+// Text writes ast.Text node
+func (r *Renderer) Text(w io.Writer, text *ast.Text) {
 	if r.opts.Flags&Smartypants != 0 {
 		var tmp bytes.Buffer
 		EscapeHTML(&tmp, text.Literal)
@@ -445,41 +498,46 @@ func (r *Renderer) text(w io.Writer, text *ast.Text) {
 	}
 }
 
-func (r *Renderer) hardBreak(w io.Writer, node *ast.Hardbreak) {
-	r.outOneOf(w, r.opts.Flags&UseXHTML == 0, "<br>", "<br />")
-	r.cr(w)
+// HardBreak writes ast.Hardbreak node
+func (r *Renderer) HardBreak(w io.Writer, node *ast.Hardbreak) {
+	r.OutOneOf(w, r.opts.Flags&UseXHTML == 0, "<br>", "<br />")
+	r.CR(w)
 }
 
-func (r *Renderer) nonBlockingSpace(w io.Writer, node *ast.NonBlockingSpace) {
-	r.outs(w, "&nbsp;")
+// NonBlockingSpace writes ast.NonBlockingSpace node
+func (r *Renderer) NonBlockingSpace(w io.Writer, node *ast.NonBlockingSpace) {
+	r.Outs(w, "&nbsp;")
 }
 
-func (r *Renderer) outOneOf(w io.Writer, outFirst bool, first string, second string) {
+// OutOneOf writes first or second depending on outFirst
+func (r *Renderer) OutOneOf(w io.Writer, outFirst bool, first string, second string) {
 	if outFirst {
-		r.outs(w, first)
+		r.Outs(w, first)
 	} else {
-		r.outs(w, second)
+		r.Outs(w, second)
 	}
 }
 
-func (r *Renderer) outOneOfCr(w io.Writer, outFirst bool, first string, second string) {
+// OutOneOfCr writes CR + first or second + CR depending on outFirst
+func (r *Renderer) OutOneOfCr(w io.Writer, outFirst bool, first string, second string) {
 	if outFirst {
-		r.cr(w)
-		r.outs(w, first)
+		r.CR(w)
+		r.Outs(w, first)
 	} else {
-		r.outs(w, second)
-		r.cr(w)
+		r.Outs(w, second)
+		r.CR(w)
 	}
 }
 
-func (r *Renderer) htmlSpan(w io.Writer, span *ast.HTMLSpan) {
+// HTMLSpan writes ast.HTMLSpan node
+func (r *Renderer) HTMLSpan(w io.Writer, span *ast.HTMLSpan) {
 	if r.opts.Flags&SkipHTML == 0 {
-		r.out(w, span.Literal)
+		r.Out(w, span.Literal)
 	}
 }
 
 func (r *Renderer) linkEnter(w io.Writer, link *ast.Link) {
-	var attrs []string
+	attrs := link.AdditionalAttributes
 	dest := link.Destination
 	dest = r.addAbsPrefix(dest)
 	var hrefBuf bytes.Buffer
@@ -488,7 +546,7 @@ func (r *Renderer) linkEnter(w io.Writer, link *ast.Link) {
 	hrefBuf.WriteByte('"')
 	attrs = append(attrs, hrefBuf.String())
 	if link.NoteID != 0 {
-		r.outs(w, footnoteRef(r.opts.FootnoteAnchorPrefix, link))
+		r.Outs(w, footnoteRef(r.opts.FootnoteAnchorPrefix, link))
 		return
 	}
 
@@ -505,14 +563,15 @@ func (r *Renderer) linkEnter(w io.Writer, link *ast.Link) {
 
 func (r *Renderer) linkExit(w io.Writer, link *ast.Link) {
 	if link.NoteID == 0 {
-		r.outs(w, "</a>")
+		r.Outs(w, "</a>")
 	}
 }
 
-func (r *Renderer) link(w io.Writer, link *ast.Link, entering bool) {
+// Link writes ast.Link node
+func (r *Renderer) Link(w io.Writer, link *ast.Link, entering bool) {
 	// mark it but don't link it if it is not a safe link: no smartypants
 	if needSkipLink(r.opts.Flags, link.Destination) {
-		r.outOneOf(w, entering, "<tt>", "</tt>")
+		r.OutOneOf(w, entering, "<tt>", "</tt>")
 		return
 	}
 
@@ -526,26 +585,35 @@ func (r *Renderer) link(w io.Writer, link *ast.Link, entering bool) {
 func (r *Renderer) imageEnter(w io.Writer, image *ast.Image) {
 	dest := image.Destination
 	dest = r.addAbsPrefix(dest)
-	if r.disableTags == 0 {
+	if r.DisableTags == 0 {
 		//if options.safe && potentiallyUnsafe(dest) {
 		//out(w, `<img src="" alt="`)
 		//} else {
-		r.outs(w, `<img src="`)
+		r.Outs(w, `<img src="`)
 		escLink(w, dest)
-		r.outs(w, `" alt="`)
+		r.Outs(w, `" alt="`)
 		//}
 	}
-	r.disableTags++
+	r.DisableTags++
 }
 
 func (r *Renderer) imageExit(w io.Writer, image *ast.Image) {
-	r.disableTags--
-	if r.disableTags == 0 {
+	r.DisableTags--
+	if r.DisableTags == 0 {
 		if image.Title != nil {
-			r.outs(w, `" title="`)
+			r.Outs(w, `" title="`)
 			EscapeHTML(w, image.Title)
 		}
-		r.outs(w, `" />`)
+		r.Outs(w, `" />`)
+	}
+}
+
+// Image writes ast.Image node
+func (r *Renderer) Image(w io.Writer, node *ast.Image, entering bool) {
+	if entering {
+		r.imageEnter(w, node)
+	} else {
+		r.imageExit(w, node)
 	}
 }
 
@@ -556,33 +624,34 @@ func (r *Renderer) paragraphEnter(w io.Writer, para *ast.Paragraph) {
 	if prev != nil {
 		switch prev.(type) {
 		case *ast.HTMLBlock, *ast.List, *ast.Paragraph, *ast.Heading, *ast.CaptionFigure, *ast.CodeBlock, *ast.BlockQuote, *ast.Aside, *ast.HorizontalRule:
-			r.cr(w)
+			r.CR(w)
 		}
 	}
 
 	if prev == nil {
 		_, isParentBlockQuote := para.Parent.(*ast.BlockQuote)
 		if isParentBlockQuote {
-			r.cr(w)
+			r.CR(w)
 		}
 		_, isParentAside := para.Parent.(*ast.Aside)
 		if isParentAside {
-			r.cr(w)
+			r.CR(w)
 		}
 	}
 
-	tag := tagWithAttributes("<p", BlockAttrs(para))
-	r.outs(w, tag)
+	tag := TagWithAttributes("<p", BlockAttrs(para))
+	r.Outs(w, tag)
 }
 
 func (r *Renderer) paragraphExit(w io.Writer, para *ast.Paragraph) {
-	r.outs(w, "</p>")
+	r.Outs(w, "</p>")
 	if !(isListItem(para.Parent) && ast.GetNextNode(para) == nil) {
-		r.cr(w)
+		r.CR(w)
 	}
 }
 
-func (r *Renderer) paragraph(w io.Writer, para *ast.Paragraph, entering bool) {
+// Paragraph writes ast.Paragraph node
+func (r *Renderer) Paragraph(w io.Writer, para *ast.Paragraph, entering bool) {
 	if skipParagraphTags(para) {
 		return
 	}
@@ -592,27 +661,22 @@ func (r *Renderer) paragraph(w io.Writer, para *ast.Paragraph, entering bool) {
 		r.paragraphExit(w, para)
 	}
 }
-func (r *Renderer) image(w io.Writer, node *ast.Image, entering bool) {
-	if entering {
-		r.imageEnter(w, node)
-	} else {
-		r.imageExit(w, node)
-	}
-}
 
-func (r *Renderer) code(w io.Writer, node *ast.Code) {
-	r.outs(w, "<code>")
+// Code writes ast.Code node
+func (r *Renderer) Code(w io.Writer, node *ast.Code) {
+	r.Outs(w, "<code>")
 	EscapeHTML(w, node.Literal)
-	r.outs(w, "</code>")
+	r.Outs(w, "</code>")
 }
 
-func (r *Renderer) htmlBlock(w io.Writer, node *ast.HTMLBlock) {
+// HTMLBlock write ast.HTMLBlock node
+func (r *Renderer) HTMLBlock(w io.Writer, node *ast.HTMLBlock) {
 	if r.opts.Flags&SkipHTML != 0 {
 		return
 	}
-	r.cr(w)
-	r.out(w, node.Literal)
-	r.cr(w)
+	r.CR(w)
+	r.Out(w, node.Literal)
+	r.CR(w)
 }
 
 func (r *Renderer) headingEnter(w io.Writer, nodeData *ast.Heading) {
@@ -644,18 +708,19 @@ func (r *Renderer) headingEnter(w io.Writer, nodeData *ast.Heading) {
 		attrs = append(attrs, attrID)
 	}
 	attrs = append(attrs, BlockAttrs(nodeData)...)
-	r.cr(w)
+	r.CR(w)
 	r.outTag(w, headingOpenTagFromLevel(nodeData.Level), attrs)
 }
 
 func (r *Renderer) headingExit(w io.Writer, heading *ast.Heading) {
-	r.outs(w, headingCloseTagFromLevel(heading.Level))
+	r.Outs(w, headingCloseTagFromLevel(heading.Level))
 	if !(isListItem(heading.Parent) && ast.GetNextNode(heading) == nil) {
-		r.cr(w)
+		r.CR(w)
 	}
 }
 
-func (r *Renderer) heading(w io.Writer, node *ast.Heading, entering bool) {
+// Heading writes ast.Heading node
+func (r *Renderer) Heading(w io.Writer, node *ast.Heading, entering bool) {
 	if entering {
 		r.headingEnter(w, node)
 	} else {
@@ -663,10 +728,11 @@ func (r *Renderer) heading(w io.Writer, node *ast.Heading, entering bool) {
 	}
 }
 
-func (r *Renderer) horizontalRule(w io.Writer, node *ast.HorizontalRule) {
-	r.cr(w)
+// HorizontalRule writes ast.HorizontalRule node
+func (r *Renderer) HorizontalRule(w io.Writer, node *ast.HorizontalRule) {
+	r.CR(w)
 	r.outHRTag(w, BlockAttrs(node))
-	r.cr(w)
+	r.CR(w)
 }
 
 func (r *Renderer) listEnter(w io.Writer, nodeData *ast.List) {
@@ -674,17 +740,17 @@ func (r *Renderer) listEnter(w io.Writer, nodeData *ast.List) {
 	var attrs []string
 
 	if nodeData.IsFootnotesList {
-		r.outs(w, "\n<div class=\"footnotes\">\n\n")
+		r.Outs(w, "\n<div class=\"footnotes\">\n\n")
 		if r.opts.Flags&FootnoteNoHRTag == 0 {
 			r.outHRTag(w, nil)
-			r.cr(w)
+			r.CR(w)
 		}
 	}
-	r.cr(w)
+	r.CR(w)
 	if isListItem(nodeData.Parent) {
 		grand := nodeData.Parent.GetParent()
 		if isListTight(grand) {
-			r.cr(w)
+			r.CR(w)
 		}
 	}
 
@@ -700,7 +766,7 @@ func (r *Renderer) listEnter(w io.Writer, nodeData *ast.List) {
 	}
 	attrs = append(attrs, BlockAttrs(nodeData)...)
 	r.outTag(w, openTag, attrs)
-	r.cr(w)
+	r.CR(w)
 }
 
 func (r *Renderer) listExit(w io.Writer, list *ast.List) {
@@ -711,7 +777,7 @@ func (r *Renderer) listExit(w io.Writer, list *ast.List) {
 	if list.ListFlags&ast.ListTypeDefinition != 0 {
 		closeTag = "</dl>"
 	}
-	r.outs(w, closeTag)
+	r.Outs(w, closeTag)
 
 	//cr(w)
 	//if node.parent.Type != Item {
@@ -721,18 +787,19 @@ func (r *Renderer) listExit(w io.Writer, list *ast.List) {
 	switch parent.(type) {
 	case *ast.ListItem:
 		if ast.GetNextNode(list) != nil {
-			r.cr(w)
+			r.CR(w)
 		}
 	case *ast.Document, *ast.BlockQuote, *ast.Aside:
-		r.cr(w)
+		r.CR(w)
 	}
 
 	if list.IsFootnotesList {
-		r.outs(w, "\n</div>\n")
+		r.Outs(w, "\n</div>\n")
 	}
 }
 
-func (r *Renderer) list(w io.Writer, list *ast.List, entering bool) {
+// List writes ast.List node
+func (r *Renderer) List(w io.Writer, list *ast.List, entering bool) {
 	if entering {
 		r.listEnter(w, list)
 	} else {
@@ -742,11 +809,11 @@ func (r *Renderer) list(w io.Writer, list *ast.List, entering bool) {
 
 func (r *Renderer) listItemEnter(w io.Writer, listItem *ast.ListItem) {
 	if listItemOpenCR(listItem) {
-		r.cr(w)
+		r.CR(w)
 	}
 	if listItem.RefLink != nil {
 		slug := slugify(listItem.RefLink)
-		r.outs(w, footnoteItem(r.opts.FootnoteAnchorPrefix, slug))
+		r.Outs(w, footnoteItem(r.opts.FootnoteAnchorPrefix, slug))
 		return
 	}
 
@@ -757,7 +824,7 @@ func (r *Renderer) listItemEnter(w io.Writer, listItem *ast.ListItem) {
 	if listItem.ListFlags&ast.ListTypeTerm != 0 {
 		openTag = "<dt>"
 	}
-	r.outs(w, openTag)
+	r.Outs(w, openTag)
 }
 
 func (r *Renderer) listItemExit(w io.Writer, listItem *ast.ListItem) {
@@ -766,7 +833,7 @@ func (r *Renderer) listItemExit(w io.Writer, listItem *ast.ListItem) {
 		prefix := r.opts.FootnoteAnchorPrefix
 		link := r.opts.FootnoteReturnLinkContents
 		s := footnoteReturnLink(prefix, link, slug)
-		r.outs(w, s)
+		r.Outs(w, s)
 	}
 
 	closeTag := "</li>"
@@ -776,11 +843,12 @@ func (r *Renderer) listItemExit(w io.Writer, listItem *ast.ListItem) {
 	if listItem.ListFlags&ast.ListTypeTerm != 0 {
 		closeTag = "</dt>"
 	}
-	r.outs(w, closeTag)
-	r.cr(w)
+	r.Outs(w, closeTag)
+	r.CR(w)
 }
 
-func (r *Renderer) listItem(w io.Writer, listItem *ast.ListItem, entering bool) {
+// ListItem writes ast.ListItem node
+func (r *Renderer) ListItem(w io.Writer, listItem *ast.ListItem, entering bool) {
 	if entering {
 		r.listItemEnter(w, listItem)
 	} else {
@@ -788,38 +856,74 @@ func (r *Renderer) listItem(w io.Writer, listItem *ast.ListItem, entering bool)
 	}
 }
 
-func (r *Renderer) codeBlock(w io.Writer, codeBlock *ast.CodeBlock) {
+// EscapeHTMLCallouts writes html-escaped d to w. It escapes &, <, > and " characters, *but*
+// expands callouts <<N>> with the callout HTML, i.e. by calling r.callout() with a newly created
+// ast.Callout node.
+func (r *Renderer) EscapeHTMLCallouts(w io.Writer, d []byte) {
+	ld := len(d)
+Parse:
+	for i := 0; i < ld; i++ {
+		for _, comment := range r.opts.Comments {
+			if !bytes.HasPrefix(d[i:], comment) {
+				break
+			}
+
+			lc := len(comment)
+			if i+lc < ld {
+				if id, consumed := parser.IsCallout(d[i+lc:]); consumed > 0 {
+					// We have seen a callout
+					callout := &ast.Callout{ID: id}
+					r.Callout(w, callout)
+					i += consumed + lc - 1
+					continue Parse
+				}
+			}
+		}
+
+		escSeq := Escaper[d[i]]
+		if escSeq != nil {
+			w.Write(escSeq)
+		} else {
+			w.Write([]byte{d[i]})
+		}
+	}
+}
+
+// CodeBlock writes ast.CodeBlock node
+func (r *Renderer) CodeBlock(w io.Writer, codeBlock *ast.CodeBlock) {
 	var attrs []string
 	// TODO(miek): this can add multiple class= attribute, they should be coalesced into one.
 	// This is probably true for some other elements as well
 	attrs = appendLanguageAttr(attrs, codeBlock.Info)
 	attrs = append(attrs, BlockAttrs(codeBlock)...)
-	r.cr(w)
+	r.CR(w)
 
-	r.outs(w, "<pre>")
-	code := tagWithAttributes("<code", attrs)
-	r.outs(w, code)
+	r.Outs(w, "<pre>")
+	code := TagWithAttributes("<code", attrs)
+	r.Outs(w, code)
 	if r.opts.Comments != nil {
 		r.EscapeHTMLCallouts(w, codeBlock.Literal)
 	} else {
 		EscapeHTML(w, codeBlock.Literal)
 	}
-	r.outs(w, "</code>")
-	r.outs(w, "</pre>")
+	r.Outs(w, "</code>")
+	r.Outs(w, "</pre>")
 	if !isListItem(codeBlock.Parent) {
-		r.cr(w)
+		r.CR(w)
 	}
 }
 
-func (r *Renderer) caption(w io.Writer, caption *ast.Caption, entering bool) {
+// Caption writes ast.Caption node
+func (r *Renderer) Caption(w io.Writer, caption *ast.Caption, entering bool) {
 	if entering {
-		r.outs(w, "<figcaption>")
+		r.Outs(w, "<figcaption>")
 		return
 	}
-	r.outs(w, "</figcaption>")
+	r.Outs(w, "</figcaption>")
 }
 
-func (r *Renderer) captionFigure(w io.Writer, figure *ast.CaptionFigure, entering bool) {
+// CaptionFigure writes ast.CaptionFigure node
+func (r *Renderer) CaptionFigure(w io.Writer, figure *ast.CaptionFigure, entering bool) {
 	// TODO(miek): copy more generic ways of mmark over to here.
 	fig := "<figure"
 	if figure.HeadingID != "" {
@@ -827,13 +931,14 @@ func (r *Renderer) captionFigure(w io.Writer, figure *ast.CaptionFigure, enterin
 	} else {
 		fig += ">"
 	}
-	r.outOneOf(w, entering, fig, "\n</figure>\n")
+	r.OutOneOf(w, entering, fig, "\n</figure>\n")
 }
 
-func (r *Renderer) tableCell(w io.Writer, tableCell *ast.TableCell, entering bool) {
+// TableCell writes ast.TableCell node
+func (r *Renderer) TableCell(w io.Writer, tableCell *ast.TableCell, entering bool) {
 	if !entering {
-		r.outOneOf(w, tableCell.IsHeader, "</th>", "</td>")
-		r.cr(w)
+		r.OutOneOf(w, tableCell.IsHeader, "</th>", "</td>")
+		r.CR(w)
 		return
 	}
 
@@ -848,44 +953,47 @@ func (r *Renderer) tableCell(w io.Writer, tableCell *ast.TableCell, entering boo
 		attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
 	}
 	if ast.GetPrevNode(tableCell) == nil {
-		r.cr(w)
+		r.CR(w)
 	}
 	r.outTag(w, openTag, attrs)
 }
 
-func (r *Renderer) tableBody(w io.Writer, node *ast.TableBody, entering bool) {
+// TableBody writes ast.TableBody node
+func (r *Renderer) TableBody(w io.Writer, node *ast.TableBody, entering bool) {
 	if entering {
-		r.cr(w)
-		r.outs(w, "<tbody>")
+		r.CR(w)
+		r.Outs(w, "<tbody>")
 		// XXX: this is to adhere to a rather silly test. Should fix test.
 		if ast.GetFirstChild(node) == nil {
-			r.cr(w)
+			r.CR(w)
 		}
 	} else {
-		r.outs(w, "</tbody>")
-		r.cr(w)
+		r.Outs(w, "</tbody>")
+		r.CR(w)
 	}
 }
 
-func (r *Renderer) matter(w io.Writer, node *ast.DocumentMatter, entering bool) {
+// DocumentMatter writes ast.DocumentMatter
+func (r *Renderer) DocumentMatter(w io.Writer, node *ast.DocumentMatter, entering bool) {
 	if !entering {
 		return
 	}
 	if r.documentMatter != ast.DocumentMatterNone {
-		r.outs(w, "</section>\n")
+		r.Outs(w, "</section>\n")
 	}
 	switch node.Matter {
 	case ast.DocumentMatterFront:
-		r.outs(w, `<section data-matter="front">`)
+		r.Outs(w, `<section data-matter="front">`)
 	case ast.DocumentMatterMain:
-		r.outs(w, `<section data-matter="main">`)
+		r.Outs(w, `<section data-matter="main">`)
 	case ast.DocumentMatterBack:
-		r.outs(w, `<section data-matter="back">`)
+		r.Outs(w, `<section data-matter="back">`)
 	}
 	r.documentMatter = node.Matter
 }
 
-func (r *Renderer) citation(w io.Writer, node *ast.Citation) {
+// Citation writes ast.Citation node
+func (r *Renderer) Citation(w io.Writer, node *ast.Citation) {
 	for i, c := range node.Destination {
 		attr := []string{`class="none"`}
 		switch node.Type[i] {
@@ -897,23 +1005,25 @@ func (r *Renderer) citation(w io.Writer, node *ast.Citation) {
 			attr[0] = `class="suppressed"`
 		}
 		r.outTag(w, "<cite", attr)
-		r.outs(w, fmt.Sprintf(`<a href="#%s">`+r.opts.CitationFormatString+`</a>`, c, c))
-		r.outs(w, "</cite>")
+		r.Outs(w, fmt.Sprintf(`<a href="#%s">`+r.opts.CitationFormatString+`</a>`, c, c))
+		r.Outs(w, "</cite>")
 	}
 }
 
-func (r *Renderer) callout(w io.Writer, node *ast.Callout) {
+// Callout writes ast.Callout node
+func (r *Renderer) Callout(w io.Writer, node *ast.Callout) {
 	attr := []string{`class="callout"`}
 	r.outTag(w, "<span", attr)
-	r.out(w, node.ID)
-	r.outs(w, "</span>")
+	r.Out(w, node.ID)
+	r.Outs(w, "</span>")
 }
 
-func (r *Renderer) index(w io.Writer, node *ast.Index) {
+// Index writes ast.Index node
+func (r *Renderer) Index(w io.Writer, node *ast.Index) {
 	// there is no in-text representation.
 	attr := []string{`class="index"`, fmt.Sprintf(`id="%s"`, node.ID)}
 	r.outTag(w, "<span", attr)
-	r.outs(w, "</span>")
+	r.Outs(w, "</span>")
 }
 
 // RenderNode renders a markdown node to HTML
@@ -926,102 +1036,102 @@ func (r *Renderer) RenderNode(w io.Writer, node ast.Node, entering bool) ast.Wal
 	}
 	switch node := node.(type) {
 	case *ast.Text:
-		r.text(w, node)
+		r.Text(w, node)
 	case *ast.Softbreak:
-		r.cr(w)
+		r.CR(w)
 		// TODO: make it configurable via out(renderer.softbreak)
 	case *ast.Hardbreak:
-		r.hardBreak(w, node)
+		r.HardBreak(w, node)
 	case *ast.NonBlockingSpace:
-		r.nonBlockingSpace(w, node)
+		r.NonBlockingSpace(w, node)
 	case *ast.Emph:
-		r.outOneOf(w, entering, "<em>", "</em>")
+		r.OutOneOf(w, entering, "<em>", "</em>")
 	case *ast.Strong:
-		r.outOneOf(w, entering, "<strong>", "</strong>")
+		r.OutOneOf(w, entering, "<strong>", "</strong>")
 	case *ast.Del:
-		r.outOneOf(w, entering, "<del>", "</del>")
+		r.OutOneOf(w, entering, "<del>", "</del>")
 	case *ast.BlockQuote:
-		tag := tagWithAttributes("<blockquote", BlockAttrs(node))
-		r.outOneOfCr(w, entering, tag, "</blockquote>")
+		tag := TagWithAttributes("<blockquote", BlockAttrs(node))
+		r.OutOneOfCr(w, entering, tag, "</blockquote>")
 	case *ast.Aside:
-		tag := tagWithAttributes("<aside", BlockAttrs(node))
-		r.outOneOfCr(w, entering, tag, "</aside>")
+		tag := TagWithAttributes("<aside", BlockAttrs(node))
+		r.OutOneOfCr(w, entering, tag, "</aside>")
 	case *ast.Link:
-		r.link(w, node, entering)
+		r.Link(w, node, entering)
 	case *ast.CrossReference:
 		link := &ast.Link{Destination: append([]byte("#"), node.Destination...)}
-		r.link(w, link, entering)
+		r.Link(w, link, entering)
 	case *ast.Citation:
-		r.citation(w, node)
+		r.Citation(w, node)
 	case *ast.Image:
 		if r.opts.Flags&SkipImages != 0 {
 			return ast.SkipChildren
 		}
-		r.image(w, node, entering)
+		r.Image(w, node, entering)
 	case *ast.Code:
-		r.code(w, node)
+		r.Code(w, node)
 	case *ast.CodeBlock:
-		r.codeBlock(w, node)
+		r.CodeBlock(w, node)
 	case *ast.Caption:
-		r.caption(w, node, entering)
+		r.Caption(w, node, entering)
 	case *ast.CaptionFigure:
-		r.captionFigure(w, node, entering)
+		r.CaptionFigure(w, node, entering)
 	case *ast.Document:
 		// do nothing
 	case *ast.Paragraph:
-		r.paragraph(w, node, entering)
+		r.Paragraph(w, node, entering)
 	case *ast.HTMLSpan:
-		r.htmlSpan(w, node)
+		r.HTMLSpan(w, node)
 	case *ast.HTMLBlock:
-		r.htmlBlock(w, node)
+		r.HTMLBlock(w, node)
 	case *ast.Heading:
-		r.heading(w, node, entering)
+		r.Heading(w, node, entering)
 	case *ast.HorizontalRule:
-		r.horizontalRule(w, node)
+		r.HorizontalRule(w, node)
 	case *ast.List:
-		r.list(w, node, entering)
+		r.List(w, node, entering)
 	case *ast.ListItem:
-		r.listItem(w, node, entering)
+		r.ListItem(w, node, entering)
 	case *ast.Table:
-		tag := tagWithAttributes("<table", BlockAttrs(node))
-		r.outOneOfCr(w, entering, tag, "</table>")
+		tag := TagWithAttributes("<table", BlockAttrs(node))
+		r.OutOneOfCr(w, entering, tag, "</table>")
 	case *ast.TableCell:
-		r.tableCell(w, node, entering)
+		r.TableCell(w, node, entering)
 	case *ast.TableHeader:
-		r.outOneOfCr(w, entering, "<thead>", "</thead>")
+		r.OutOneOfCr(w, entering, "<thead>", "</thead>")
 	case *ast.TableBody:
-		r.tableBody(w, node, entering)
+		r.TableBody(w, node, entering)
 	case *ast.TableRow:
-		r.outOneOfCr(w, entering, "<tr>", "</tr>")
+		r.OutOneOfCr(w, entering, "<tr>", "</tr>")
 	case *ast.TableFooter:
-		r.outOneOfCr(w, entering, "<tfoot>", "</tfoot>")
+		r.OutOneOfCr(w, entering, "<tfoot>", "</tfoot>")
 	case *ast.Math:
-		r.outOneOf(w, true, `<span class="math inline">\(`, `\)</span>`)
+		r.OutOneOf(w, true, `<span class="math inline">\(`, `\)</span>`)
 		EscapeHTML(w, node.Literal)
-		r.outOneOf(w, false, `<span class="math inline">\(`, `\)</span>`)
+		r.OutOneOf(w, false, `<span class="math inline">\(`, `\)</span>`)
 	case *ast.MathBlock:
-		r.outOneOf(w, entering, `<p><span class="math display">\[`, `\]</span></p>`)
+		r.OutOneOf(w, entering, `<p><span class="math display">\[`, `\]</span></p>`)
 		if entering {
 			EscapeHTML(w, node.Literal)
 		}
 	case *ast.DocumentMatter:
-		r.matter(w, node, entering)
+		r.DocumentMatter(w, node, entering)
 	case *ast.Callout:
-		r.callout(w, node)
+		r.Callout(w, node)
 	case *ast.Index:
-		r.index(w, node)
+		r.Index(w, node)
 	case *ast.Subscript:
-		r.outOneOf(w, true, "<sub>", "</sub>")
+		r.OutOneOf(w, true, "<sub>", "</sub>")
 		if entering {
 			Escape(w, node.Literal)
 		}
-		r.outOneOf(w, false, "<sub>", "</sub>")
+		r.OutOneOf(w, false, "<sub>", "</sub>")
 	case *ast.Superscript:
-		r.outOneOf(w, true, "<sup>", "</sup>")
+		r.OutOneOf(w, true, "<sup>", "</sup>")
 		if entering {
 			Escape(w, node.Literal)
 		}
-		r.outOneOf(w, false, "<sup>", "</sup>")
+		r.OutOneOf(w, false, "<sup>", "</sup>")
 	case *ast.Footnotes:
 		// nothing by default; just output the list.
 	default:
@@ -1041,7 +1151,7 @@ func (r *Renderer) RenderHeader(w io.Writer, ast ast.Node) {
 // RenderFooter writes HTML document footer.
 func (r *Renderer) RenderFooter(w io.Writer, _ ast.Node) {
 	if r.documentMatter != ast.DocumentMatterNone {
-		r.outs(w, "</section>\n")
+		r.Outs(w, "</section>\n")
 	}
 
 	if r.opts.Flags&CompletePage == 0 {
@@ -1315,7 +1425,8 @@ func BlockAttrs(node ast.Node) []string {
 	return s
 }
 
-func tagWithAttributes(name string, attrs []string) string {
+// TagWithAttributes creates a HTML tag with a given name and attributes
+func TagWithAttributes(name string, attrs []string) string {
 	s := name
 	if len(attrs) > 0 {
 		s += " " + strings.Join(attrs, " ")
diff --git a/vendor/github.com/gomarkdown/markdown/parser/block.go b/vendor/github.com/gomarkdown/markdown/parser/block.go
index a0b80991..5ef55e98 100644
--- a/vendor/github.com/gomarkdown/markdown/parser/block.go
+++ b/vendor/github.com/gomarkdown/markdown/parser/block.go
@@ -1074,10 +1074,14 @@ func isBackslashEscaped(data []byte, i int) bool {
 func (p *Parser) tableHeader(data []byte) (size int, columns []ast.CellAlignFlags, table ast.Node) {
 	i := 0
 	colCount := 1
+	headerIsUnderline := true
 	for i = 0; i < len(data) && data[i] != '\n'; i++ {
 		if data[i] == '|' && !isBackslashEscaped(data, i) {
 			colCount++
 		}
+		if data[i] != '-' && data[i] != ' ' && data[i] != ':' && data[i] != '|' {
+			headerIsUnderline = false
+		}
 	}
 
 	// doesn't look like a table header
@@ -1097,10 +1101,18 @@ func (p *Parser) tableHeader(data []byte) (size int, columns []ast.CellAlignFlag
 		colCount--
 	}
 
+	// if the header looks like a underline, then we omit the header
+	// and parse the first line again as underline
+	if headerIsUnderline {
+		header = nil
+		i = 0
+	} else {
+		i++ // move past newline
+	}
+
 	columns = make([]ast.CellAlignFlags, colCount)
 
 	// move on to the header underline
-	i++
 	if i >= len(data) {
 		return
 	}
@@ -1175,8 +1187,10 @@ func (p *Parser) tableHeader(data []byte) (size int, columns []ast.CellAlignFlag
 
 	table = &ast.Table{}
 	p.addBlock(table)
-	p.addBlock(&ast.TableHeader{})
-	p.tableRow(header, columns, true)
+	if header != nil {
+		p.addBlock(&ast.TableHeader{})
+		p.tableRow(header, columns, true)
+	}
 	size = skipCharN(data, i, '\n', 1)
 	return
 }