Snippet: Fix highlighting of forward slashes in regex

Fixes #241.

Author: FichteFoll

Package/Sublime Text Snippet/Sublime Text Snippet (Raw).sublime-syntax

@@ -67,7 +67,9 @@ contexts:
                 - match: (?=/)
                   pop: true
         - match: ''
-          push: scope:source.regexp
-          with_prototype:
+          push:
+            # Will not work if extended mode is enabled in the regex
+            - meta_scope: source.regexp.embedded
             - match: (?=/)
               pop: true
+            - include: scope:source.regexp#base-literal

Package/Sublime Text Snippet/syntax_test_snippet.xml

@@ -206,6 +206,11 @@ It is possible to include a literal newline in the replacement: ${1/test/_
 #^ keyword.other.regex.end
 # ^ keyword.other.block.end
 
+
+${TM_CURRENT_LINE/^\\s*((?:\\/\\/[\\/!]?|#|%|--|::|(?i:rem)|'|;)\\s*).*/$1/}
+#                            ^ meta.group.regexp meta.group.regexp meta.literal.regexp
+#                                                                      ^ keyword.other.regex.mid.snippet
+
  ]]>snippet<</content>
 #^^^ meta.tag.cdata punctuation.definition.tag.end
 #   ^^^^^^^ source.sublime.snippet