Fix valid class tweaker files initially erroring until reopened (#2608 ) * Fix valid class tweaker files initially erroring until reopened The slightly hacky fix utilises a "fake token" that matches real-looking line starts. It's unused in the parser so the user will still see an error when possible, but eliminating the BAD_CHARACTER inputs for valid *characters* seems to fix the incorrect error highlighting. * CtParser: Make invalid_entry_start_holder private to remove unused PSI itf * Clarify comment ⁠ juuz 2 files  d3067241bcde 13 Apr 26 19:23