diff --git a/lib/ansible/plugins/callback/mail.py b/lib/ansible/plugins/callback/mail.py
index 8f1c4a9cdfc..247e4954672 100644
--- a/lib/ansible/plugins/callback/mail.py
+++ b/lib/ansible/plugins/callback/mail.py
@@ -83,7 +83,7 @@ class CallbackModule(CallbackBase):
         return '%s: %s' % (failtype, multiline.strip('\r\n').splitlines()[linenr])
 
     def indent(self, multiline, indent=8):
-        return re.sub('^', ' '*indent, multiline, flags=re.MULTILINE)
+        return re.sub('^', ' ' * indent, multiline, flags=re.MULTILINE)
 
     def body_blob(self, multiline, texttype):
         ''' Turn some text output in a well-indented block for sending in a mail body '''
@@ -148,10 +148,10 @@ class CallbackModule(CallbackBase):
             body += self.body_blob(result._result['stderr'], 'error output')
         if result._result.get('warnings'):
             for i in range(len(result._result.get('warnings'))):
-                body += self.body_blob(result._result['warnings'][i], 'exception %d' % i+1)
+                body += self.body_blob(result._result['warnings'][i], 'exception %d' % i + 1)
         if result._result.get('deprecations'):
             for i in range(len(result._result.get('deprecations'))):
-                body += self.body_blob(result._result['deprecations'][i], 'exception %d' % i+1)
+                body += self.body_blob(result._result['deprecations'][i], 'exception %d' % i + 1)
 
         body += 'and a complete dump of the error:\n\n'
         body += self.indent('%s: %s' % (failtype, json.dumps(result._result, indent=4)))