many *.m4 files: improve m4 quoting 99% of this change was performed by running the following commands: git ls-files | grep '\.m4$' | xargs perl -pi \ -e 's/(AC_\w+\()([^[()]+?)([,)])/$1\[$2]$3/g;' \ -e 's/(AC_\w+\((?:\[[^,]+?\], ){1})([^,[()]+?)([,)])/$1\[$2]$3/g;' \ -e 's/(AC_\w+\((?:\[[^,]+?\], ){2})([^,[()]+?)([,)])/$1\[$2]$3/g;' \ -e 's/(AC_\w+\((?:\[[^,]+?\], ){3})([^,[()]+?)([,)])/$1\[$2]$3/g' perl -pi -e 's/\[\.\.\.\]/.../' m4/onceonly.m4 The remainder were to add Copyright dates, increment serial numbers, undo some changes in comments, exclude m4/intl.m4, and add quotes around the "1" in ",1" where the unusual spacing prohibited the above regexps from doing the job. For more details, see <http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/16175>.

--- a/m4/inet_ntop.m4
+++ b/m4/inet_ntop.m4
@@ -1,5 +1,5 @@
-# inet_ntop.m4 serial 7
-dnl Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+# inet_ntop.m4 serial 8
+dnl Copyright (C) 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,7 +11,7 @@
 
   gl_REPLACE_ARPA_INET_H
 
-  AC_REPLACE_FUNCS(inet_ntop)
+  AC_REPLACE_FUNCS([inet_ntop])
   gl_PREREQ_INET_NTOP
 ])