Search and replace - add blank lines after namespace declarations

At the moment PHP Code Sniffer Fixer, I use it via the Sublime Text PHP Code Sniffer plugin, seems not to fix missing blank lines after namespace declarations.
[caption id=“attachment_543” align=“aligncenter” width=“965”]Missing blank line Missing blank line[/caption] It’s not a drama and a quick search and replace in Sublime Text can fix that [caption id=“attachment_544” align=“aligncenter” width=“552”]One of Sublime Text best functions One of Sublime Text best functions[/caption] Here is the match

(^namespace\s+[\w\\_]*;$)(?!\n{2,})

and here it is the replacement

$1\n

I’ve launched it on the file tree from the library root and did not unleash hell on the code. This is as far as testing it has gone.