enable link brackets escaper

Author: JohannesKaufmann

escape/escape.go

@@ -13,6 +13,7 @@ var orderedList = regexp.MustCompile(`(?m)^(\W* {0,3})(\d+)\. `)
 var unorderedList = regexp.MustCompile(`(?m)^([^\\\w]*)[*+-] `)
 var horizontalDivider = regexp.MustCompile(`(?m)^([-*_] *){3,}$`)
 var blockquote = regexp.MustCompile(`(?m)^(\W* {0,3})> `)
+var link = regexp.MustCompile(`([\[\]])`)
 
 var replacer = strings.NewReplacer(
 	`*`, `\*`,
@@ -57,10 +58,8 @@ func MarkdownCharacters(text string) string {
 	// Escape code _
 	text = replacer.Replace(text)
 
-	// Escape link brackets
-	// 	(disabled)
-	// var link = regexp.MustCompile(`[\[\]]`)
-	// text = link.ReplaceAllString(text, `\$&`)
+	// Escape link & image brackets
+	text = link.ReplaceAllString(text, `\$1`)
 
 	return text
 }

testdata/TestCommonmark/p_tag/output.default.golden

@@ -6,7 +6,7 @@ Some Text
 
 Some Content
 
-jmap –histo[:live]
+jmap –histo\[:live\]
 
 Sometimes a struct field, function, type, or even a whole package becomes
 

testdata/TestRealWorld/snippets/square_brackets/goldmark.golden

@@ -1,3 +1,7 @@
 <p>first [literal] brackets</p>
 <p>then [one] way to escape</p>
 <p>then [another] one</p>
+<p>jmap –histo[:live]</p>
+<p>[this should be escaped](http://test)</p>
+<p>before: [this should be escaped](http://test) after</p>
+<p>image ![alt](/img.png)</p>

testdata/TestRealWorld/snippets/square_brackets/input.html

@@ -1,3 +1,9 @@
 <p>first [literal] brackets</p>
 <p>then &#91;one&#93; way to escape</p>
 <p>then &lbrack;another&rbrack; one</p>
+
+<p>jmap –histo[:live]</p>
+
+<p>[this should be escaped](http://test)</p>
+<p>before: [this should be escaped](http://test) after</p>
+<p>image ![alt](/img.png)</p>

testdata/TestRealWorld/snippets/square_brackets/output.default.golden

@@ -1,5 +1,13 @@
-first [literal] brackets
+first \[literal\] brackets
 
-then [one] way to escape
+then \[one\] way to escape
 
-then [another] one
+then \[another\] one
+
+jmap –histo\[:live\]
+
+\[this should be escaped\](http://test)
+
+before: \[this should be escaped\](http://test) after
+
+image !\[alt\](/img.png)