Fix linting errors; fix some real bugs (#5111) (#5114)

* Fix linting errors.

* Fix bugs.

* Another linter error ignored.

* More fixes.

* Ignore sanity errors with older versions.

ci_complete

* Forgot to commit more changes.

(cherry picked from commit a54af8909c)

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/modules/system/beadm.py

@@ -165,10 +165,10 @@ class BE(object):
             for line in out.splitlines():
                 if self.is_freebsd:
                     check = line.split()
-                    if(check == []):
+                    if check == []:
                         continue
                     full_name = check[0].split('/')
-                    if(full_name == []):
+                    if full_name == []:
                         continue
                     check[0] = full_name[len(full_name) - 1]
                     if check[0] == self.name: