psql: Fix \pset by adding missed xheader_width option to the help

From a5f59e77f3caf5b6bbbfc441393da68999e9e9fc Mon Sep 17 00:00:00 2001
From: Pavel Luzanov <p.luzanov@postgrespro.ru>
Date: Thu, 21 Nov 2024 22:32:44 +0300
Subject: [PATCH v1] psql: Fix help for \pset by adding missed xheader_width
 option

psql --help=commands, psql --help=variables and corresponding
\? and \? variables inside psql missed xheader_width option
for the pset command.
---
 src/bin/psql/help.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/bin/psql/help.c b/src/bin/psql/help.c
index 02fe5d151e..e657dc8448 100644
--- a/src/bin/psql/help.c
+++ b/src/bin/psql/help.c
@@ -294,7 +294,7 @@ slashUsage(unsigned short int pager)
 		  "                         numericlocale|pager|pager_min_lines|recordsep|\n"
 		  "                         recordsep_zero|tableattr|title|tuples_only|\n"
 		  "                         unicode_border_linestyle|unicode_column_linestyle|\n"
-		  "                         unicode_header_linestyle)\n");
+		  "                         unicode_header_linestyle|xheader_width)\n");
 	HELPN("  \\t [on|off]            show only rows (currently %s)\n",
 		  ON(pset.popt.topt.tuples_only));
 	HELP0("  \\T [STRING]            set HTML <table> tag attributes, or unset if none\n");
@@ -494,7 +494,10 @@ helpVariables(unsigned short int pager)
 	HELP0("  unicode_border_linestyle\n"
 		  "  unicode_column_linestyle\n"
 		  "  unicode_header_linestyle\n"
-		  "    set the style of Unicode line drawing [single, double]\n");
+		  "    set the style of Unicode line drawing [single, double]\n"
+		  "  xheader_width\n"
+		  "    set the maximum width of the header for expanded output to one of\n"
+		  "    full (the default value), column, page, or an integer value\n");
 
 	HELP0("\nEnvironment variables:\n");
 	HELP0("Usage:\n");
-- 
2.34.1