Bind vc-region-history

* lisp/vc/vc-hooks.el (vc-prefix-map):
Bind `vc-region-history' to 'C-x v h', which was earlier bound to
`vc-insert-headers' (Bug#27644).
* doc/emacs/maintaining.texi (VC Change Log): Mention the new binding.
* doc/emacs/vc1-xtra.texi (Version Headers): Remove the association of
'C-x v h' with `vc-insert-headers'.
(http://lists.gnu.org/archive/html/emacs-devel/2017-09/msg00957.html)

doc/emacs/maintaining.texi

@@ -1050,13 +1050,14 @@ increase the number of revisions shown in an existing
 entries} or @samp{Show unlimited entries} buttons at the end of the
 buffer.  However, RCS, SCCS, and CVS do not support this feature.
 
+@kindex C-x v h
 @findex vc-region-history
 A useful variant of examining changes is provided by the command
-@kbd{vc-region-history}, which shows a @file{*VC-history*} buffer with
+@kbd{vc-region-history} (by default bound to @kbd{C-x v h}), which shows
-the history of changes to the region of the current file between point
+a @file{*VC-history*} buffer with the history of changes to the region
-and the mark (@pxref{Mark}).  The history of changes includes the
+of the current file between point and the mark (@pxref{Mark}).  The
-commit log messages and also the changes themselves in the Diff
+history of changes includes the commit log messages and also the
-format.
+changes themselves in the Diff format.
 
 Invoke this command after marking the region of the current file in
 whose changes you are interested.  In the @file{*VC-history*} buffer

doc/emacs/vc1-xtra.texi

@@ -238,20 +238,19 @@ is one, to determine the file version, since it is often more reliable
 than the RCS master file.  To inhibit using the version header this
 way, change the variable @code{vc-consult-headers} to @code{nil}.
 
-@kindex C-x v h
 @findex vc-insert-headers
 @vindex vc-@var{backend}-header
-  To insert a suitable header string into the current buffer, type
+  To insert a suitable header string into the current buffer, use the
-@kbd{C-x v h} (@code{vc-insert-headers}).  This command works only on
+command @kbd{M-x vc-insert-headers}.  This command works only on
 Subversion, CVS, RCS, and SCCS@.  The variable
 @code{vc-@var{backend}-header} contains the list of keywords to insert
 into the version header; for instance, CVS uses @code{vc-cvs-header},
 whose default value is @code{'("\$Id\$")}.  (The extra backslashes
 prevent the string constant from being interpreted as a header, if the
 Emacs Lisp file defining it is maintained with version control.)  The
-@kbd{C-x v h} command inserts each keyword in the list on a new line
+@code{vc-insert-headers} command inserts each keyword in the list on a
-at point, surrounded by tabs, and inside comment delimiters if
+new line at point, surrounded by tabs, and inside comment delimiters
-necessary.
+if necessary.
 
 @vindex vc-static-header-alist
   The variable @code{vc-static-header-alist} specifies further strings

etc/NEWS

@@ -1115,6 +1115,10 @@ See the 'vc-faces' customization group.
 *** 'vc-dir-mode' now binds 'vc-log-outgoing' to 'O'; and has various
 branch-related commands on a keymap bound to 'B'.
 
+---
+*** 'vc-region-history' is now bound to 'C-x v h', replacing the older
+'vc-insert-headers' binding.
+
 ** CC mode
 
 ---

lisp/vc/vc-hooks.el

@@ -882,7 +882,7 @@ In the latter case, VC mode is deactivated for this buffer."
     (define-key map "d" 'vc-dir)
     (define-key map "g" 'vc-annotate)
     (define-key map "G" 'vc-ignore)
-    (define-key map "h" 'vc-insert-headers)
+    (define-key map "h" 'vc-region-history)
     (define-key map "i" 'vc-register)
     (define-key map "l" 'vc-print-log)
     (define-key map "L" 'vc-print-root-log)