Add installing entab to pgindent instructions

And minor other pgindent documentation tweaks.

src/tools/pgindent/README

@@ -6,28 +6,34 @@ pgindent
 This can format all PostgreSQL *.c and *.h files, but excludes *.y, and
 *.l files.
 
-1) Install pg_bsd_indent (see below for details)
+1) Install pg_bsd_indent (see below for details).
 
-2) Change directory to the top of the build tree.
+2) Install entab (src/tools/entab/).
 
-3) Download the typedef file from the buildfarm:
+3) Change directory to the top of the build tree.
+
+4) Download the typedef file from the buildfarm:
 
 	wget -O src/tools/pgindent/typedefs.list http://buildfarm.postgresql.org/cgi-bin/typedefs.pl
 
-4) Remove all derived files (pgindent has trouble with one of the flex macros):
+5) Remove all derived files (pgindent has trouble with one of the flex macros):
 
 	gmake maintainer-clean
 
-5) Run pgindent:
+   Or:
+
+        git clean -fdx
+
+6) Run pgindent:
 
 	find . -name '*.[ch]' -type f -print | \
 	egrep -v -f src/tools/pgindent/exclude_file_patterns | \
 	xargs -n100 src/tools/pgindent/pgindent src/tools/pgindent/typedefs.list
 
-6) Remove any files that generate errors and restore their original
+7) Remove any files that generate errors and restore their original
    versions.
 
-7) Do a full test build:
+8) Do a full test build:
 
 	run configure
 	# stop is only necessary if it's going to install in a location with an
@@ -37,7 +43,7 @@ This can format all PostgreSQL *.c and *.h files, but excludes *.y, and
 	gmake -C contrib install
 	gmake installcheck-world
 
-8) Indent the Perl MSVC code:
+9) Indent the Perl MSVC code:
 
 	cd src/tools/msvc
 	perltidy -b -bl -nsfs -naws -l=100 -ole=unix *.pl *.pm
@@ -47,7 +53,7 @@ This can format all PostgreSQL *.c and *.h files, but excludes *.y, and
 BSD indent
 ----------
 
-We have standardized on NetBSD's indent, and renamed it pg_bsd_indent. 
+We have standardized on NetBSD's indent, and renamed it pg_bsd_indent.
 We have fixed a few bugs which requre the NetBSD source to be patched
 with indent.bsd.patch patch.  A fully patched version is available at
 ftp://ftp.postgresql.org/pub/dev.