Remove trailing whitespace from bookmark.el coding cookie

[Robert Pluim]

Thereʼs a trailing space in the coding cookie that bookmark.el writes
to bookmark files, which is allowed but not required by the format,
but makes my git commit hooks complain. Any objections to me
installing the following on master?

modified   lisp/bookmark.el
@@ -734,7 +734,7 @@ bookmark-insert-file-format-version-stamp
   (if (memq (coding-system-base coding) '(undecided prefer-utf-8))
       (setq coding 'utf-8-emacs))
   (insert
-   (format ";;;; Emacs Bookmark Format Version %d ;;;; -*- coding: %S -*- \n"
+   (format ";;;; Emacs Bookmark Format Version %d ;;;; -*- coding: %S -*-\n"
            bookmark-file-format-version (coding-system-base coding)))
   (insert ";;; This format is meant to be slightly human-readable;\n"
           ";;; nevertheless, you probably don't want to edit it.\n"