id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc
995,"regex replace should support $1, $2, ...",zenogantner,,"When using regex search, it should be possible to replace the found text with the content of captured buffers, denoted by $1, $2, etc.

I guess this also the behavior that Perl developers expect:
If you use regexes for replacing stuff, you expect $n to work ...",enhancement,new,minor,,editor,0.69,,"search, replace, regex",