Fix typos.

* allout.el
* dired-aux.el
* dired-x.el
* epa-file.el
* ps-print.el
* shell.el
* vc-hooks.el
* vc-rcs.el
* vc-sccs.el
* vc.el
* view.el
* wdired.el
* emacs-lisp/authors.el
* net/dig.el
* net/socks.el
* net/zeroconf.el
* obsolete/vc-mcvs.el
* progmodes/gdb-mi.el
* progmodes/grep.el
* progmodes/idlw-help.el
* progmodes/idlw-shell.el
* progmodes/idlwave.el
* progmodes/inf-lisp.el
* textmodes/bibtex.el
* textmodes/ispell.el
* textmodes/reftex-toc.el

lisp/emacs-lisp/authors.el

@@ -866,7 +866,7 @@ buffer *Authors Errors* containing references to unknown files."
     (unless (file-exists-p (expand-file-name "src/emacs.c" root))
       (unless (y-or-n-p
 	       (format "Not the root directory of Emacs: %s, continue? " root))
-	(error "Not the root directory.")))
+	(error "Not the root directory")))
     (dolist (log logs)
       (when (string-match "ChangeLog\\(.[0-9]+\\)?$" log)
 	(message "Scanning %s..." log)