tests: use "git xyzzy" form (t0000 - t3599)

Converts tests between t0050-t3903.

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t1007-hash-object.sh b/t/t1007-hash-object.sh
index 1ec0535..076b082 100755
--- a/t/t1007-hash-object.sh
+++ b/t/t1007-hash-object.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-test_description="git-hash-object"
+test_description="git hash-object"
 
 . ./test-lib.sh