Fix fenced code block highlight with c++

Add `+` to language characters.

diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 92ff8719822cb5d5a145fea2e42e7bfa6987164e..5ee9cc483e39b52057fc95997185dc7d406bdb05 100644 (file)
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -69,9 +69,9 @@ syn match  mkdLineBreak    /  \+$/
 syn region mkdBlockquote   start=/^\s*>/                   end=/$/ contains=mkdLineBreak,mkdLineContinue,@Spell
 syn region mkdCode         start=/\(\([^\\]\|^\)\\\)\@<!`/ end=/\(\([^\\]\|^\)\\\)\@<!`/
 syn region mkdCode         start=/\s*``[^`]*/              end=/[^`]*``\s*/
-syn region mkdCode         start=/^\s*```\s*[0-9A-Za-z_-]*\s*$/          end=/^\s*```\s*$/
+syn region mkdCode         start=/^\s*```\s*[0-9A-Za-z_+-]*\s*$/          end=/^\s*```\s*$/
 syn region mkdCode         start=/\s*\~\~[^\~]*/              end=/[^\~]*\~\~\s*/
-syn region mkdCode         start=/^\s*\~\~\~\s*[0-9A-Za-z_-]*\s*$/          end=/^\s*\~\~\~\s*$/
+syn region mkdCode         start=/^\s*\~\~\~\s*[0-9A-Za-z_+-]*\s*$/          end=/^\s*\~\~\~\s*$/
 syn region mkdCode         start="<pre[^>]*>"              end="</pre>"
 syn region mkdCode         start="<code[^>]*>"             end="</code>"
 syn region mkdFootnote     start="\[^"                     end="\]"

diff --git a/test/syntax.vader b/test/syntax.vader
index 0b2c86047625c4fc5232bdbf508c76ba8ecbe26a..8b9b21a6d2951d8f13f4275291e81b9d3f3185ae 100644 (file)
--- a/test/syntax.vader
+++ b/test/syntax.vader
@@ -155,6 +155,17 @@ code
 Execute (code blocks can have a language specifier):
   AssertEqual SyntaxOf('c'), 'mkdCode'
 
+Given markdown;
+```c++
+code
+```
+
+text
+
+Execute (code blocks can be fenced with backticks and a language specifier):
+  AssertEqual SyntaxOf('code'), 'mkdCode'
+  AssertNotEqual SyntaxOf('text'), 'mkdCode'
+
 # Math
 
 Given markdown;