batch write-region no longer says "Wrote FOO"

This cuts down on 'make' chatter a bit.
* doc/lispref/files.texi (Writing to Files):
* etc/NEWS: Document this.
* src/fileio.c (Fwrite_region):
Don't output "Wrote /whatever/foo.elc" if noninteractive.

doc/lispref/ChangeLog

+2015-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	batch write-region no longer says "Wrote FOO"
+	* files.texi (Writing to Files): Document this.
+
 2014-12-31  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Less 'make' chatter for Emacs doc

doc/lispref/files.texi

@@ -653,8 +653,9 @@ and also calls the functions in the list
 @xref{Format Conversion}.
 
 Normally, @code{write-region} displays the message @samp{Wrote
-@var{filename}} in the echo area.  If @var{visit} is neither @code{t}
-nor @code{nil} nor a string, then this message is inhibited.  This
+@var{filename}} in the echo area.  This message is inhibited if
+@var{visit} is neither @code{t} nor @code{nil} nor a string, or if
+Emacs is operating in batch mode (@pxref{Batch mode}).  This
 feature is useful for programs that use files for internal purposes,
 files that the user does not need to know about.
 @end deffn

etc/ChangeLog

+2015-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	batch write-region no longer says "Wrote FOO"
+	* NEWS: Document this.
+
 2014-12-30  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* PROBLEMS: Omit obsolete mention of FQDNs.

etc/NEWS

@@ -551,6 +551,9 @@ system's name has changed or if the Emacs process has changed systems,
 and to avoid long waits it no longer consults DNS to canonicalize the
 name.  The variable `system-name' is now obsolete.
 
++++
+** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
+
 ---
 ** New utilities in subr-x.el:
 *** New macros `if-let' and `when-let' allow defining bindings and to

src/ChangeLog

+2015-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	batch write-region no longer says "Wrote FOO"
+	This cuts down on 'make' chatter a bit.
+	* fileio.c (Fwrite_region):
+	Don't output "Wrote /whatever/foo.elc" if noninteractive.
+
 2015-01-03  Paul Eggert  <eggert@cs.ucla.edu>
 	Revert previous change to produce_composite_glyph

src/fileio.c

@@ -4741,8 +4741,8 @@ Optional fifth argument VISIT, if t or a string, means
 If VISIT is a string, it is a second file name;
   the output goes to FILENAME, but the buffer is marked as visiting VISIT.
   VISIT is also the file name to lock and unlock for clash detection.
-If VISIT is neither t nor nil nor a string,
-  that means do not display the \"Wrote file\" message.
+If VISIT is neither t nor nil nor a string, or if Emacs is in batch mode,
+  do not display the \"Wrote file\" message.
 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
   use for locking and unlocking, overriding FILENAME and VISIT.
 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
@@ -5109,7 +5109,7 @@ write_region (Lisp_Object start, Lisp_Object end, Lisp_Object filename,
       return Qnil;
     }
 
-  if (!auto_saving)
+  if (!auto_saving && !noninteractive)
     message_with_string ((NUMBERP (append)
 			  ? "Updated %s"
 			  : ! NILP (append)