Line 1185:
          ("\\(^\\|[^\\\\]\\)\\(\\\\\\\\\\)*[?$]\\([#\"'`]\\)" 3 (1 . nil))

A workaround (with, to me, uknown consequences) is to remove the question mark 
from the line, like this:

          ("\\(^\\|[^\\\\]\\)\\(\\\\\\\\\\)*[$]\\([#\"'`]\\)" 3 (1 . nil))