pg_upgrade: Small fix for better translatability of help output

src/bin/pg_upgrade/option.c

@@ -312,8 +312,8 @@ usage(void)
 	printf(_("  -v, --verbose                 enable verbose internal logging\n"));
 	printf(_("  -V, --version                 display version information, then exit\n"));
 	printf(_("  --clone                       clone instead of copying files to new cluster\n"));
-	printf(_("  --index-collation-versions-unknown\n"));
-	printf(_("                                mark text indexes as needing to be rebuilt\n"));
+	printf(_("  --index-collation-versions-unknown\n"
+			 "                                mark text indexes as needing to be rebuilt\n"));
 	printf(_("  -?, --help                    show this help, then exit\n"));
 	printf(_("\n"
 			 "Before running pg_upgrade you must:\n"