chainlint.sed: drop subshell-closing ">" annotation

chainlint.sed inserts a ">" annotation at the beginning of a line to
signal that its heuristics have identified an end-of-subshell. This was
useful as a debugging aid during development of the script, but it has
no value to test writers and might even confuse them into thinking that
the linter is misbehaving by inserting line-noise into the shell code it
is validating. Moreover, its presence also potentially makes it
difficult to reuse the chainlint self-test "expect" output should a more
capable linter ever be developed. Therefore, drop the ">" annotation.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/chainlint/multi-line-nested-command-substitution.expect

@@ -3,16 +3,16 @@
 	x=$(
 		echo bar |
 		cat
->>	) &&
+	) &&
 	echo ok
->) |
+) |
 sort &&
 (
 	bar &&
 	x=$(echo bar |
 		cat
->>	) &&
+	) &&
 	y=$(echo baz |
->>		fip) &&
+		fip) &&
 	echo fail
->)
+)