emacs-28 a344667: Fix typo in describe-map-tree doc string

[Lars Ingebrigtsen]

branch: emacs-28
commit a34466731b11959f799e4f7415a81dbeaa768d81
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Fix typo in describe-map-tree doc string
    
    * lisp/help.el (describe-map-tree): Fix typo in doc string.
---
 lisp/help.el | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lisp/help.el b/lisp/help.el
index d22f50d..21c8255 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -1233,10 +1233,10 @@ If NOMENU is non-nil, then omit menu-bar commands.
 If TRANSL is non-nil, the definitions are actually key
 translations so print strings and vectors differently.
 
-If ALWAYS_TITLE is non-nil, print the title even if there are no
+If ALWAYS-TITLE is non-nil, print the title even if there are no
 maps to look through.
 
-If MENTION_SHADOW is non-nil, then when something is shadowed by
+If MENTION-SHADOW is non-nil, then when something is shadowed by
 SHADOW, don't omit it; instead, mention it but say it is
 shadowed.