tests: use "git xyzzy" form (t7200 - t9001)

Converts tests between t7201-t9001.

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 1c857cf..d098a01 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-test_description='git-send-email'
+test_description='git send-email'
 . ./test-lib.sh
 
 PROG='git send-email'