Make pg_bsd_indent add a space between comma and period.

Formatting of variadic functions and struct literals with named fields
used to be ugly due to pg_bsd_indent treating period as always being a
binary operator.  After a comma, it's not that, so insert a space.

Bump pg_bsd_indent's version so that people who use out-of-tree
copies will know they need to update.  (This also covers the other
pg_bsd_indent behavioral change introduced in a3e6beba6.)

Author: Andreas Karlsson <andreas@proxel.se>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/c3327be8-09e2-46a1-88b4-228a339d6916@proxel.se

src/tools/pg_bsd_indent/args.c

@@ -51,7 +51,7 @@ static char sccsid[] = "@(#)args.c	8.1 (Berkeley) 6/6/93";
 #include "indent_globs.h"
 #include "indent.h"
 
-#define INDENT_VERSION	"2.1.2"
+#define INDENT_VERSION	"2.1.3"
 
 /* profile types */
 #define	PRO_SPECIAL	1	/* special case */

src/tools/pg_bsd_indent/indent.c

@@ -1013,6 +1013,8 @@ check_type:
 
 	case period:		/* treat a period kind of like a binary
 				 * operation */
+	    if (ps.want_blank && ps.last_token == comma)
+	        *e_code++ = ' ';
 	    *e_code++ = '.';	/* move the period into line */
 	    ps.want_blank = false;	/* don't put a blank after a period */
 	    break;

src/tools/pg_bsd_indent/tests/declarations.0.stdout

@@ -54,7 +54,7 @@ int_create(void)
 static
 _attribute_printf(1, 2)
 void
-print_error(const char *fmt,...)
+print_error(const char *fmt, ...)
 {
 
 }

src/tools/pg_bsd_indent/tests/struct.0

@@ -19,3 +19,5 @@ void u(struct x a) {
 	int b;
 	struct y c = (struct y *)&a;
 }
+
+static struct foo f = { .a = 1,.b=2 };

src/tools/pg_bsd_indent/tests/struct.0.stdout

@@ -21,3 +21,5 @@ u(struct x a)
 	int		b;
 	struct y	c = (struct y *)&a;
 }
+
+static struct foo f = {.a = 1, .b = 2};

src/tools/pgindent/pgindent

@@ -35,7 +35,7 @@ my $bak_to_cleanup;
 END { unlink $bak_to_cleanup if defined $bak_to_cleanup; }
 
 # Update for pg_bsd_indent version
-my $INDENT_VERSION = "2.1.2";
+my $INDENT_VERSION = "2.1.3";
 
 # Our standard indent settings
 my $indent_opts =