Index: doc/src/sgml/Makefile
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/Makefile,v
retrieving revision 1.135
diff -c -c -r1.135 Makefile
*** doc/src/sgml/Makefile	6 Jan 2010 19:07:05 -0000	1.135
--- doc/src/sgml/Makefile	5 Feb 2010 14:49:26 -0000
***************
*** 345,350 ****
--- 345,352 ----
  
  endif # sqlmansectnum != 7
  
+ check-tabs:
+ 	( ! grep '	' $(wildcard $(srcdir)/*.sgml $(srcdir)/ref/*.sgml) ) || (echo "Tabs appear in SGML files";  exit 1)
  
  ##
  ## Clean