Fix typo in a comment in t/test-lib.sh

Signed-off-by: Michele Ballabio <barra_cuda@katamail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 90b6844..142540e 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -257,7 +257,7 @@
 	echo >&3 ""
 }
 
-# Most tests can use the created repository, but some amy need to create more.
+# Most tests can use the created repository, but some may need to create more.
 # Usage: test_create_repo <directory>
 test_create_repo () {
 	test "$#" = 1 ||