t3032: limit sed branch labels to 8 characters

POSIX leaves as unspecified the handling of labels greater than 8
characters.  Apparently, Sun decided to treat them as errors.  Make sed on
Solaris happy by trimming the length of labels to 8 characters.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3032-merge-recursive-options.sh

@@ -16,13 +16,13 @@ test_description='merge-recursive options
 test_expect_success 'setup' '
 	conflict_hunks () {
 		sed -n -e "
-			/^<<<</ b inconflict
+			/^<<<</ b conflict
 			b
-			: inconflict
+			: conflict
 			p
 			/^>>>>/ b
 			n
-			b inconflict
+			b conflict
 		" "$@"
 	} &&