updated for version 7.3.423
Problem:    Small mistakes in comments, proto and indent.
Solution:   Fix the mistakes.

Also update runtime files
diff --git a/runtime/syntax/mail.vim b/runtime/syntax/mail.vim
index cf4a2c6..823c6b4 100644
--- a/runtime/syntax/mail.vim
+++ b/runtime/syntax/mail.vim
@@ -2,13 +2,16 @@
 " Language:		Mail file
 " Previous Maintainer:	Felix von Leitner <leitner@math.fu-berlin.de>
 " Maintainer:		GI <a@b.c>, where a='gi1242+vim', b='gmail', c='com'
-" Last Change:		Sat 03 Dec 2011 10:34:27 PM EST
+" Last Change:		Thu 02 Feb 2012 08:47:04 PM EST
 
 " Quit when a syntax file was already loaded
 if exists("b:current_syntax")
   finish
 endif
 
+let s:cpo_save = &cpo
+set cpo&vim
+
 " The mail header is recognized starting with a "keyword:" line and ending
 " with an empty line or other line that can't be in the header. All lines of
 " the header are highlighted. Headers of quoted messages (quoted with >) are
@@ -40,7 +43,7 @@
 syn region	mailHeaderKey	contained contains=mailHeaderEmail,mailEmail,@mailQuoteExps,@NoSpell start="\v(^(\> ?)*)@<=(to|b?cc):" skip=",$" end="$"
 syn match	mailHeaderKey	contained contains=mailHeaderEmail,mailEmail,@NoSpell "\v(^(\> ?)*)@<=(from|reply-to):.*$" fold
 syn match	mailHeaderKey	contained contains=@NoSpell "\v(^(\> ?)*)@<=date:"
-syn match	mailSubject	contained contains=@NoSpell "\v^subject:.*$" fold
+syn match	mailSubject	contained "\v^subject:.*$" fold
 syn match	mailSubject	contained contains=@NoSpell "\v(^(\> ?)+)@<=subject:.*$"
 
 " Anything in the header between < and > is an email address
@@ -104,3 +107,6 @@
 hi def link mailQuoteExp6	mailQuoted6
 
 let b:current_syntax = "mail"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save