pgindent run for release 9.3

This is the first run of the Perl-based pgindent script.  Also update
pgindent instructions.

src/interfaces/ecpg/compatlib/informix.c

@@ -311,7 +311,6 @@ deccvlong(long lng, decimal *np)
 int
 decdiv(decimal *n1, decimal *n2, decimal *result)
 {
-
 	int			i;
 
 	errno = 0;