emacs-28 e0f54c62ec: CC Mode: fontify variables/functions after line comments ending in spaces

[Alan Mackenzie]

branch: emacs-28
commit e0f54c62ecb72c41a9afc6d6c3e22b1a0b113f11
Author: Alan Mackenzie <acm@muc.de>
Commit: Alan Mackenzie <acm@muc.de>

    CC Mode: fontify variables/functions after line comments ending in spaces
    
    * lisp/progmodes/cc-engine.el (c-forward-comment-minus-1): Take account of
    spaces preceding a linefeed when scanning a putative line comment end.
---
 lisp/progmodes/cc-engine.el | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lisp/progmodes/cc-engine.el b/lisp/progmodes/cc-engine.el
index 3068c41a57..80ac496749 100644
--- a/lisp/progmodes/cc-engine.el
+++ b/lisp/progmodes/cc-engine.el
@@ -1668,9 +1668,13 @@ comment at the start of cc-engine.el for more info."
 Return the result of `forward-comment' if it gets called, nil otherwise."
   `(if (not comment-end-can-be-escaped)
        (forward-comment -1)
-     (when (and (< (skip-syntax-backward " >") 0)
-               (eq (char-after) ?\n))
-       (forward-char))
+     (let ((dist (skip-syntax-backward " >")))
+       (when (and
+             (< dist 0)
+             (progn
+               (skip-syntax-forward " " (- (point) dist 1))
+               (eq (char-after) ?\n)))
+        (forward-char)))
      (cond
       ((and (eq (char-before) ?\n)
            (eq (char-before (1- (point))) ?\\))