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<?php $regex = '/(?<!<br>)(?<!\s)\s*(\((?:(?:(?!<br>|\(|\)).)*(?:\((?:(?!<br>|\(|\)).)*\))?)*?\))\s*(\{)/si'; $test_string = '(""L"",function(){})'; echo preg_replace($regex,' $1 $2',$test_string);
Output for git.master, git.master_jit, rfc.property-hooks
(""L"",function () {})

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