Fixed yaml test runner

Signed-off-by: saimedhi <saimedhi@amazon.com>

Author: saimedhi

test_opensearchpy/test_server/test_rest_api_spec.py

@@ -382,7 +382,7 @@ def run_match(self, action: Any) -> None:
                 and expected.strip().endswith("/")
             ):
                 print("entered if")
-                expected = re.compile(expected[1:-1], re.VERBOSE | re.MULTILINE)
+                expected = re.compile(expected.strip()[1:-1], re.VERBOSE | re.MULTILINE)
                 assert expected.search(value), "%r does not match %r" % (
                     value,
                     expected,