Wording improvements to README.

src/tools/pgindent/README

-$PostgreSQL: pgsql/src/tools/pgindent/README,v 1.36 2010/02/26 15:42:36 momjian Exp $
+$PostgreSQL: pgsql/src/tools/pgindent/README,v 1.37 2010/02/26 15:57:34 momjian Exp $
 
 pgindent
 ========
@@ -12,8 +12,7 @@ This can format all PostgreSQL *.c and *.h files, but excludes *.y, and
 
 	wget -O src/tools/pgindent/typedefs.list http://www.pgbuildfarm.org/cgi-bin/typedefs.pl
 
-3) Clean out all derived files (pgindent has trouble with one of the
-   flex macros):
+3) Remove all derived files (pgindent has trouble with one of the flex macros):
 
 	gmake maintainer-clean
 
@@ -52,8 +51,6 @@ src/include/snowball/libstemmer/ and src/backend/snowball/libstemmer/
 are excluded because those files are imported from an external project,
 not maintained locally, and are machine-generated anyway.
 
-YY_INPUT
-
 ---------------------------------------------------------------------------
 
 Obsolete typedef list creation instructions: