bug#4927: 23.1; checkdoc-proper-noun-regexp with regexp-opt

[Kevin Ryde]

This is the simplification I mentioned before for the way
checkdoc-proper-noun-regexp is built.

You'd be tempted to build the regexp within
checkdoc-proper-noun-region-engine (maybe just with mapconcat) for
easier customizing of checkdoc-proper-noun-list, but I suppose nobody
changes it.

2009-11-13  Kevin Ryde  <user42@zip.com.au>

        * emacs-lisp/checkdoc.el (checkdoc-proper-noun-regexp): Build
        value with regexp-opt instead of explicit joining loop.

--- checkdoc.el.~1.80.~ 2009-11-09 08:46:10.000000000 +1100
+++ checkdoc.el 2009-11-09 09:33:33.000000000 +1100
@@ -334,12 +334,9 @@
   ;; "[.!?]" is for noun at end of a sentence, since those chars
   ;; are symbol syntax in emacs-lisp-mode and so don't match \\_>.
   ;; The \" allows it to be the last sentence in a docstring too.
-  (let ((expr "\\_<\\(")
-       (l checkdoc-proper-noun-list))
-    (while l
-      (setq expr (concat expr (car l) (if (cdr l) "\\|" ""))
-           l (cdr l)))
-    (concat expr "\\)\\(\\_>\\|[.!?][ \t\n\"]\\)"))
+  (concat "\\_<"
+         (regexp-opt checkdoc-proper-noun-list t)
+         "\\(\\_>\\|[.!?][ \t\n\"]\\)")
   "Regular expression derived from `checkdoc-proper-noun-regexp'.")
 
 (defvar checkdoc-common-verbs-regexp nil



In GNU Emacs 23.1.1 (i486-pc-linux-gnu, GTK+ Version 2.16.5)
 of 2009-09-14 on raven, modified by Debian
configured using `configure  '--build=i486-linux-gnu' '--host=i486-linux-gnu' 
'--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' 
'--localstatedir=/var/lib' '--infodir=/usr/share/info' 
'--mandir=/usr/share/man' '--with-pop=yes' 
'--enable-locallisppath=/etc/emacs23:/etc/emacs:/usr/local/share/emacs/23.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.1/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.1/leim'
 '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 
'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g 
-O2' 'LDFLAGS=-g' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU
  value of $XMODIFIERS: nil
  locale-coding-system: iso-latin-1-unix
  default-enable-multibyte-characters: t