Fix linting errors; fix some real bugs (#5111)

* Fix linting errors.

* Fix bugs.

* Another linter error ignored.

* More fixes.

* Ignore sanity errors with older versions.

ci_complete

* Forgot to commit more changes.

plugins/modules/packaging/language/yarn.py

@@ -222,7 +222,7 @@ class Yarn(object):
             rc, out, err = self.module.run_command(cmd, check_rc=check_rc, cwd=cwd)
             return out, err
 
-        return(None, None)
+        return None, None
 
     def list(self):
         cmd = ['list', '--depth=0', '--json']