(help-go-back): Delete period from end of error message.

diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index 11656ec368c1fd0edccf83bfbf9ea553cd93f1d0..a2dcdf91ed864423efe543cfa17e21c5b76b0ceb 100644 (file)
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -581,7 +581,7 @@ help buffer."
   (interactive)
   (if help-xref-stack
       (help-xref-go-back (current-buffer))
-    (error "No previous help buffer.")))
+    (error "No previous help buffer")))
 
 (defun help-do-xref (pos function args)
   "Call the help cross-reference function FUNCTION with args ARGS.