Have psql's "\? variables" show csv_fieldsep

Accidental omission in commit aa2ba50c2c13.  There are too many lists of
these variables ...

Discussion: https://postgr.es/m/202511031738.eqaeaedpx5cr@alvherre.pgsql

diff --git a/src/bin/psql/help.c b/src/bin/psql/help.c
index 6ae1a9940dec7362f1f2a5a76351cb93edb0c6e1..45d20ea57bc6bb1167eb36bb9f34b3479b19139a 100644 (file)
--- a/src/bin/psql/help.c
+++ b/src/bin/psql/help.c
@@ -480,6 +480,9 @@ helpVariables(unsigned short int pager)
                  "    border style (number)\n");
        HELP0("  columns\n"
                  "    target width for the wrapped format\n");
+       HELPN("  csv_fieldsep\n"
+                 "    field separator for CSV output format (default \"%c\")\n",
+                 DEFAULT_CSV_FIELD_SEP);
        HELP0("  display_false\n"
                  "    set the string to be printed in place of a boolean 'false'\n");
        HELP0("  display_true\n"