  
      INSTALLED_APPS = [
          ...
          'polls.apps.PollsAppConfig',
          ...
      ]
  
  For application authors
  -----------------------
  
 
</s> remove         ...
 </s> add         ..., </s> remove         ...
 </s> add         # ... </s> remove         ...
 </s> add         # ... </s> remove                ...
 </s> add                ..., </s> remove         ...
 </s> add         ...,
        ...,
  
      INSTALLED_APPS = [
          ...
          'polls.apps.PollsAppConfig',
        ...,
      ]
  
  For application authors
  -----------------------
  
keep keep keep keep replace keep keep keep keep keep
 Refs #34140 -- Corrected rst code-block and various formatting issues in docs. 
docs/ref/applications.txt