* lisp/progmodes/c-ts-common.el:
(c-ts-common--fill-block-comment): Add check for end-mask-done. This
doesn't affect correctness, but makes the code easier to read.
(cherry picked from commit
458a79b3c7eb164e254f86d5610418ffd5050fec)
(fill-region (max start-marker para-start) (min end para-end) arg))
;; Unmask.
- (when end-marker
+ (when (and end-marker end-mask-done)
(goto-char end-marker)
(delete-region (point) (+ end-len (point)))
(insert (make-string end-len ?\s)))