bug#32012: 27.0.50; jit-lock--run-functions broken

[Eli Zaretskii]

> From: Andreas Röhler <andreas.roehler@online.de>
> Date: Fri, 29 Jun 2018 22:16:55 +0200
> 
> Running into it from ert-tests which call ‘jit-lock-fontify-now’
> 
> When reproduced from emacs -Q in scratch-buffer:
> 
> Debugger entered--Lisp error: (wrong-number-of-arguments (2 . 2) 0)
>    jit-lock--run-functions()
>    eval((jit-lock--run-functions) nil)
>    elisp--eval-last-sexp(nil)
>    eval-last-sexp(nil)
>    funcall-interactively(eval-last-sexp nil)
>    call-interactively(eval-last-sexp nil nil)
>    command-execute(eval-last-sexp)

Why did you think you can call that function tis way?