Subject: bug#40193: 27.0.50; nxml-newline-and-indent argument should be optional

From: Sergey Trofimov <[email-masked]>
Date: Mon, 23 Mar 2020 06:47:02 +0100

According to the definition of comment-line-break-function:
  The function should take a single optional argument, which is a flag
  indicating whether it should use soft newlines.

But in nxml-mode:
  (setq-local comment-line-break-function #'nxml-newline-and-indent)
  (defun nxml-newline-and-indent (soft) ...)

Could you please make an argument optional?