Fix StackOverflow in variable parsing #7809
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Description
The CSV parsing regex is extraordinarily slow at matching quoted variable names, to the point it causes StackOverflows that prevent variables from being loaded at all. This is due to the regex matching checking for "", then matching "" or a single character, and repeat for the next character, until it recurses too far. This PR fixes that by allowing the matching of multiple non-" characters between each "" check.
Target Minecraft Versions: any
Requirements: none
Related Issues: none