Fix interactive spec of message-beginning-of-line

* lisp/gnus/message.el (message-beginning-of-line): Fix problem
with C-S-a getting translated to C-a in message-mode (bug#39545).

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index 417982731e8..d4b057f593c 100644
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -6497,7 +6497,7 @@ When called without a prefix argument, header value spanning
 multiple lines is treated as a single line.  Otherwise, even if
 N is 1, when point is on a continuation header line, it will be
 moved to the beginning "
-  (interactive "p")
+  (interactive "^p")
   (cond
    ;; Go to beginning of header or beginning of line.
    ((and message-beginning-of-line (message-point-in-header-p))