PEP 8 whitespace cleanup. (#20783)

* PEP 8 E271 whitespace cleanup.
* PEP 8 W293 whitespace cleanup.
* Fix whitespace issue from recent PR.

lib/ansible/modules/system/sysctl.py

@@ -279,7 +279,7 @@ class SysctlModule(object):
             sysctl_args = [self.sysctl_cmd, '-p', self.sysctl_file]
             if self.args['ignoreerrors']:
                 sysctl_args.insert(1, '-e')
-            
+
             rc,out,err = self.module.run_command(sysctl_args)
 
         if rc != 0: