There are two things that are tripping you up. The first is the greediness of [^"'/]+
. The part of the regex that matches a regular expression looks for an equal sign or left paren followed by a slash; unfortunately, the equal sign or left paren has already been gobbled up! You could fix this by adding = and ( to the character class. On the other hand, since you're substituting in place, you don't even need that part of the regex. Just remove [^"'/]+ |
and it should work fine.