Textile: ignore invalid lang attribute values (#18501).

git-svn-id: http://svn.redmine.org/redmine/trunk@13677 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redcloth3.rb

@@ -341,7 +341,7 @@ class RedCloth3 < String
     A_HLGN = /(?:(?:<>|<|>|\=|[()]+)+)/
     A_VLGN = /[\-^~]/
     C_CLAS = '(?:\([^")]+\))'
-    C_LNGE = '(?:\[[^"\[\]]+\])'
+    C_LNGE = '(?:\[[a-z\-_]+\])'
     C_STYL = '(?:\{[^"}]+\})'
     S_CSPN = '(?:\\\\\d+)'
     S_RSPN = '(?:/\d+)'
@@ -480,7 +480,7 @@ class RedCloth3 < String
         end
 
         lang = $1 if
-            text.sub!( /\[([^)]+?)\]/, '' )
+            text.sub!( /\[([a-z\-_]+?)\]/, '' )
 
         cls = $1 if
             text.sub!( /\(([^()]+?)\)/, '' )

test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb

@@ -110,6 +110,20 @@ class Redmine::WikiFormatting::TextileFormatterTest < ActionView::TestCase
     )
   end
 
+  def test_lang_attribute
+    assert_html_output(
+      '*[fr]French*'      => '<strong lang="fr">French</strong>',
+      '*[fr-fr]French*'   => '<strong lang="fr-fr">French</strong>',
+      '*[fr_fr]French*'   => '<strong lang="fr_fr">French</strong>'
+    )
+  end
+
+  def test_lang_attribute_should_ignore_invalid_value
+    assert_html_output(
+      '*[fr3]French*'      => '<strong>[fr3]French</strong>'
+    )
+  end
+
   def test_nested_lists
     raw = <<-RAW
 # Item 1