global: remove unnecessary horizontal tabs.

This change was made by applying emacs' untabify function to
nearly all files in Bison's repository.  Required tabs in make
files, ChangeLog, regexps, and test code were manually skipped.
Other notable exceptions and changes are listed below.
* bootstrap: Skip because we sync this with gnulib.
* data/m4sugar/foreach.m4
* data/m4sugar/m4sugar.m4: Skip because we sync these with
Autoconf.
* djgpp: Skip because I don't know how to test djgpp properly, and
this code appears to be unmaintained anyway.
* README-hacking (Hacking): Specify that tabs should be avoided
where not required.

doc/Doxyfile.in

@@ -1,4 +1,4 @@
-# Doxyfile 1.3.4		-*- Makefile -*-
+# Doxyfile 1.3.4                -*- Makefile -*-
 
 # This file describes the settings to be used by the documentation system
 # doxygen (www.doxygen.org) for a project
@@ -362,7 +362,7 @@ WARN_LOGFILE           =
 # with spaces.
 
 INPUT                  = @top_srcdir@/src \
-			 @top_builddir@/src
+                         @top_builddir@/src
 
 # If the value of the INPUT tag contains directories, you can use the
 # FILE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp
@@ -373,8 +373,8 @@ INPUT                  = @top_srcdir@/src \
 
 FILE_PATTERNS          = *.c \
                          *.h \
-	                 *.l \
-			 *.y
+                         *.l \
+                         *.y
 
 # The RECURSIVE tag can be used to turn specify whether or not subdirectories
 # should be searched for input files as well. Possible values are YES and NO.
@@ -387,8 +387,8 @@ RECURSIVE              = YES
 # subdirectory from a directory tree whose root is specified with the INPUT tag.
 
 EXCLUDE                = @top_srcdir@/src/scan-gram.c \
-	                 @top_srcdir@/src/scan-skel.c \
-	                 @top_builddir@/src/parse-*.[ch]
+                         @top_srcdir@/src/scan-skel.c \
+                         @top_builddir@/src/parse-*.[ch]
 
 # The EXCLUDE_SYMLINKS tag can be used select whether or not files or
 # directories that are symbolic links (a Unix filesystem feature) are

doc/local.mk

@@ -15,9 +15,9 @@
 
 AM_MAKEINFOFLAGS = --no-split
 info_TEXINFOS = doc/bison.texinfo
-doc_bison_TEXINFOS =				\
-  $(CROSS_OPTIONS_TEXI)				\
-  doc/fdl.texi					\
+doc_bison_TEXINFOS =                            \
+  $(CROSS_OPTIONS_TEXI)                         \
+  doc/fdl.texi                                  \
   doc/gpl-3.0.texi
 
 CLEANFILES = doc/bison.fns
@@ -35,7 +35,7 @@ $(CROSS_OPTIONS_TEXI): doc/bison.help $(CROSS_OPTIONS_PL)
 # diff in the next run.  Note that $@ might not exist yet.
 	{ test ! -f $@ || cat $@; } >$@~
 	test ! -f $@.tmp || rm -f $@.tmp
-	src/bison$(EXEEXT) --help |					 \
+	src/bison$(EXEEXT) --help |                                      \
 	  perl $(CROSS_OPTIONS_PL) $(top_srcdir)/src/scan-gram.l >$@.tmp
 	diff -u $@~ $@.tmp || true
 	mv $@.tmp $@
@@ -101,14 +101,14 @@ remove_time_stamp = \
 # Depend on configure to get version number changes.
 $(top_srcdir)/doc/bison.1: doc/bison.help doc/bison.x $(top_srcdir)/configure
 	@echo "Updating man page $@"
-	$(HELP2MAN)					\
-	    --include=$(top_srcdir)/doc/bison.x		\
+	$(HELP2MAN)                                     \
+	    --include=$(top_srcdir)/doc/bison.x         \
 	    --output=$@.t src/bison$(EXEEXT)
-	if $(remove_time_stamp) $@ >$@a.t 2>/dev/null &&		 \
+	if $(remove_time_stamp) $@ >$@a.t 2>/dev/null &&                 \
 	   $(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then \
-	  touch $@;							 \
-	else								 \
-	  mv $@.t $@;							 \
+	  touch $@;                                                      \
+	else                                                             \
+	  mv $@.t $@;                                                    \
 	fi
 	rm -f $@*.t