join: fix error message for -a and -v

* src/join.c (main): s/field/file/ in the error message
for -a and -v, introduced in TEXTUTILS-1_13-24-g6f63d53e1.
Reported at https://bugs.debian.org/1068864

diff --git a/src/join.c b/src/join.c
index fd6fc74ce9384812cc43b7dcb21bcbffb01d02f0..fd28febfb9058763eadd1d6ce1866dc16a1488cc 100644 (file)
--- a/src/join.c
+++ b/src/join.c
@@ -1045,7 +1045,7 @@ main (int argc, char **argv)
             if (xstrtol (optarg, nullptr, 10, &val, "") != LONGINT_OK
                 || (val != 1 && val != 2))
               error (EXIT_FAILURE, 0,
-                     _("invalid field number: %s"), quote (optarg));
+                     _("invalid file number: %s"), quote (optarg));
             if (val == 1)
               print_unpairables_1 = true;
             else