Merged r19333 from trunk to 3.3-stable (#25742)

Filter all possibly class values on code tags in Textile.

Contributed by Holger Just from Planio.

git-svn-id: http://svn.redmine.org/redmine/branches/3.3-stable@19337 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/wiki_formatting/textile/formatter.rb

@@ -120,9 +120,10 @@ module Redmine
             ## replace <pre> content
             text.gsub!(/<redpre#(\d+)>/) do
               content = @pre_list[$1.to_i]
-              if content.match(/<code\s+class=["'](\w+)["']>\s?(.+)/m)
-                language = $1
-                text = $2
+              # This regex must match any data produced by RedCloth3#rip_offtags
+              if content.match(/<code\s+class=(?:"([^"]+)"|'([^']+)')>\s?(.*)/m)
+                language = $1 || $2
+                text = $3
                 if Redmine::SyntaxHighlighting.language_supported?(language)
                   content = "<code class=\"#{language} syntaxhl\">" +
                     Redmine::SyntaxHighlighting.highlight_by_language(text, language)