Fix InputRule regex matcher ignoring non-text leaflets in textBefore #2807
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This PR should fix #2806
Currently non-text leaflets (which for example the Mention example is) this matcher is inserting space (
) which would fit into the regex of the extension regex match strings.
I added a placeholder for this check resulting in non-text leafs being replaced with
%leaf%
which will stop those regex from returning true when a non-text leaf is used in front.Since this function is not used for anything else but this check I think it's okay to use this %leaf% placeholder but I'm open for feedback or ideas how to solve this differently.