fix delimited codeblock end rules.

Author: fmoralesc

syntax/pandoc.vim

@@ -357,8 +357,8 @@ syn match pandocTableHeaderWord /\<.\{-}\>/ contained containedin=pandocGridTabl
 " }}}2
 " Delimited Code Blocks: {{{2
 " this is here because we can override strikeouts and subscripts
-syn region pandocDelimitedCodeBlock start=/^\(>\s\)\?\z(\(\s\{4,}\)\=\~\{3,}\~*\)/ end=/\z1\~*/ skipnl contains=pandocDelimitedCodeBlockStart,pandocDelimitedCodeBlockEnd keepend
-syn region pandocDelimitedCodeBlock start=/^\(>\s\)\?\z(\(\s\{4,}\)\=`\{3,}`*\)/ end=/\z1`*/ skipnl contains=pandocDelimitedCodeBlockStart,pandocDelimitedCodeBlockEnd keepend
+syn region pandocDelimitedCodeBlock start=/^\(>\s\)\?\z(\(\s\{4,}\)\=\~\{3,}\~*\)/ end=/^\z1\~*/ skipnl contains=pandocDelimitedCodeBlockStart,pandocDelimitedCodeBlockEnd keepend
+syn region pandocDelimitedCodeBlock start=/^\(>\s\)\?\z(\(\s\{4,}\)\=`\{3,}`*\)/ end=/^\z1`*/ skipnl contains=pandocDelimitedCodeBlockStart,pandocDelimitedCodeBlockEnd keepend
 call s:WithConceal("codeblock_start", 'syn match pandocDelimitedCodeBlockStart /\(\_^\n\_^\(>\s\)\?\(\s\{4,}\)\=\)\@<=\(\~\{3,}\~*\|`\{3,}`*\)/ contained containedin=pandocDelimitedCodeBlock nextgroup=pandocDelimitedCodeBlockLanguage', 'conceal cchar='.s:cchars["codelang"])
 syn match pandocDelimitedCodeBlockLanguage /\(\s\?\)\@<=.\+\(\_$\)\@=/ contained 
 call s:WithConceal("codeblock_delim", 'syn match pandocDelimitedCodeBlockEnd /\(`\{3,}`*\|\~\{3,}\~*\)\(\_$\n\(>\s\)\?\_$\)\@=/ contained containedin=pandocDelimitedCodeBlock', 'conceal')