fixup! repack: test --full-name-hash option

Update to the latest iteration of https://github.com/gitgitgadget/git/pull/1785.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

t/test-lib-functions.sh

@@ -1902,7 +1902,7 @@ test_subcommand_flex () {
 		shift
 	fi
 
-	local expr="$(printf '"%s",.*' "$@")"
+	local expr="$(printf '"%s".*' "$@")"
 
 	if test -n "$negate"
 	then