fix flake8 issue

Author: jborean93

Diff for: gssapi/tests/test_raw.py

@@ -763,8 +763,9 @@ def test_sasl_names(self):
     @ktu.gssapi_extension_test('ggf', 'Global Grid Forum')
     @ktu.gssapi_extension_test('s4u', 'S4U')
     @ktu.krb_minversion_test('1.16',
-                             'querying impersonator name of krb5 GSS Credential'
-                             ' using the GSS_KRB5_GET_CRED_IMPERSONATOR OID')
+                             'querying impersonator name of krb5 GSS '
+                             'Credential using the '
+                             'GSS_KRB5_GET_CRED_IMPERSONATOR OID')
     def test_inquire_cred_by_oid_impersonator(self):
         svc_princ = SERVICE_PRINCIPAL.decode("UTF-8")
         self.realm.kinit(svc_princ, flags=['-k', '-f'])