refactor: Update CSS dupe finder
refactor: Update CSS dupe finder

Before entering the main loop parenthesis and their contents are
replaced with a temporary placeholder. This is done to prevent
false detections of comments, braces, and or semicolons during
the main loop.

{master}[snippets/concepts/css_dupe_finder]

cgabriel5/snippets,cgabriel5/snippets,cgabriel5/snippets