Remove trailing blank lines when generating INSTALL

[Joseph S. Myers]

The Makefile rule to rebuild the INSTALL file leaves a trailing blank
line at the end of the file (at least, for some makeinfo versions),
causing git hooks to complain about bad whitespace if you try to check
in the regenerated file.  This patch changes that rule to remove any
trailing blank lines.  Tested x86_64.

2013-06-28  Joseph Myers  <joseph@codesourcery.com>

	* Makefile (INSTALL): Remove trailing blank lines from output of
	makeinfo.

diff --git a/Makefile b/Makefile
index 7d8eccf..fe7dfc6 100644
--- a/Makefile
+++ b/Makefile
@@ -403,7 +403,12 @@ endif
 INSTALL: manual/install.texi manual/macros.texi \
 	 $(common-objpfx)manual/pkgvers.texi
 	makeinfo --no-validate --plaintext --no-number-sections \
-		 -I$(common-objpfx)manual $< -o $@
+		 -I$(common-objpfx)manual $< -o $@-tmp
+	while tail -n 1 $@-tmp | grep '^$$'; do \
+	  head -n -1 $@-tmp > $@-tmp2; \
+	  mv $@-tmp2 $@-tmp; \
+	done
+	mv -f $@-tmp $@
 	-chmod a-w $@
 $(common-objpfx)manual/%: FORCE
 	$(MAKE) $(PARALLELMFLAGS) -C manual $@

-- 
Joseph S. Myers
joseph@codesourcery.com