maint: help Automake reading Yacc flags.

[bison.git] / README-hacking

diff --git a/README-hacking b/README-hacking
index 6a24062490beab5274eab83d128849494a885470..f79a31a8f57b25f101c37d69b55a353667b93be0 100644 (file)
--- a/README-hacking
+++ b/README-hacking
@@ -46,6 +46,13 @@ of the .output file etc.  This excludes impossible error messages
 (comparable to assert/abort), and all the --trace output which is
 meant for the maintainers only.
 
+** Horizontal tabs
+Do not add horizontal tab characters to any file in Bison's repository
+except where required.  For example, do not use tabs to format C code.
+However, make files, ChangeLog, and some regular expressions require
+tabs.  Also, test cases might need to contain tabs to check that Bison
+properly processes tabs in its input.
+
 
 * Working from the repository
 
@@ -388,7 +395,7 @@ Push these changes.
 
 -----
 
-Copyright (C) 2002-2005, 2007-2011 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc.
 
 This file is part of GNU Bison.