master dd38097f0b9: Fix regexp in help-do-arg-highlight

[Stefan Kangas]

branch: master
commit dd38097f0b9458eea882043fa06b27248e505b22
Author: Eshel Yaron <me@eshelyaron.com>
Commit: Stefan Kangas <stefankangas@gmail.com>

    Fix regexp in help-do-arg-highlight
    
    * lisp/help-fns.el (help-do-arg-highlight): Fix regexp.  (Bug#65580)
    
    Avoid highlighting (parts of) the function name as arguments in the
    output of 'describe-function' when the function has an argument with
    the same name.  To achieve this, refine the regular expression that
    'help-do-arg-highlight' uses such that it doesn't match anything in
    the function name.
---
 lisp/help-fns.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/help-fns.el b/lisp/help-fns.el
index 609bed18f2f..b34778773a9 100644
--- a/lisp/help-fns.el
+++ b/lisp/help-fns.el
@@ -369,7 +369,8 @@ if the variable `help-downcase-arguments' is non-nil."
       (setq doc (replace-regexp-in-string
                  ;; This is heuristic, but covers all common cases
                  ;; except ARG1-ARG2
-                 (concat "\\<"                   ; beginning of word
+                 (concat "([^ ]+ .*"             ; skip function name
+                         "\\<"                   ; beginning of word
                          "\\(?:[a-z-]*-\\)?"     ; for xxx-ARG
                          "\\("
                          (regexp-quote arg)