bug#7453: 24.0.50; VC documentation errata

[Bob Rogers]

   Plus a few wording tweaks.

   I also note that Monotone appears (as "Mtn") in vc-handled-backends,
and is mentioned as supported in the "32.1 Version Control" preamble,
but does not have an overview paragraph in "32.1.1.2 Supported Version
Control Systems".  I assume this is an oversight, but I am not qualified
to write such a paragraph.

                                        -- Bob Rogers
                                           http://www.rgrjr.com/

------------------------------------------------------------------------
diff --git a/doc/emacs/maintaining.texi b/doc/emacs/maintaining.texi
index b407f5b..8330025 100644
--- a/doc/emacs/maintaining.texi
+++ b/doc/emacs/maintaining.texi
@@ -544,7 +544,7 @@ locked the file, to inform him of what has happened.
 @end itemize
 
   These rules also apply when you use CVS in locking mode, except
-that there is no such thing as stealing a lock.
+that CVS does not support stealing a lock.
 
 @node Advanced C-x v v
 @subsubsection Advanced Control in @kbd{C-x v v}
@@ -1158,7 +1158,8 @@ directory buffer will be used.
 
   @kbd{M-s a C-s} does an incremental search on the marked files.
 
-  @kbd{M-s a C-M-s} does an incremental search on the marked files.
+  @kbd{M-s a C-M-s} does an incremental regular expression search
+on the marked files.
 
 @cindex stashes in version control
 @cindex shelves in version control
diff --git a/doc/emacs/vc1-xtra.texi b/doc/emacs/vc1-xtra.texi
index 5095c3f..04d3771 100644
--- a/doc/emacs/vc1-xtra.texi
+++ b/doc/emacs/vc1-xtra.texi
@@ -594,7 +594,7 @@ headers.
 @vindex vc-handled-backends
 The variable @code{vc-handled-backends} determines which version
 control systems VC should handle.  The default value is @code{(RCS CVS
-SVN SCCS BZR GIT HG Arch)}, so it contains all the version systems
+SVN SCCS Bzr Git Hg Mtn Arch)}, so it contains all the version systems
 that are currently supported.  If you want VC to ignore one or more of
 these systems, exclude its name from the list.  To disable VC entirely,
 set this variable to @code{nil}.
@@ -657,8 +657,8 @@ variable does not affect @kbd{C-x v c}; that operation is 
so drastic
 that it should always ask for confirmation.)
 
 @vindex vc-command-messages
-  VC mode does much of its work by running the shell commands for RCS,
-CVS and SCCS.  If @code{vc-command-messages} is non-@code{nil}, VC
+  VC mode does much of its work by running the shell commands for the
+appropriate backend.  If @code{vc-command-messages} is non-@code{nil}, VC
 displays messages to indicate which shell commands it runs, and
 additional messages when the commands finish.