[user_none]

Originally Posted by kovidgoyal

Given that you can chain regexes with | I don't really see the need for more.

You can chain the search regex but you can't chain the replacement text. Chaining would only be useful in a limited number of circumstances such as removing content entirely.

Originally Posted by duepixel

Also, there is a bug in the regexp (maybe only in preview?): you can't use Start of string and end of string Anchors (http://www.regular-expressions.info/anchors.html)

^ and $ work fine for start and end of string. Remember that the start of the string is the first character in the regex preview. You probably want ^ and $ to work on lines. Look the (?iLmsux) flags section of the Python Re Syntax to enable this behavior.