[GitHub] [flink] sjwiesman opened a new pull request #14041: [FLINK-20096][docs] Add clean up PyFlink docs

[GitBox]

sjwiesman opened a new pull request #14041:
URL: https://github.com/apache/flink/pull/14041


   ## What is the purpose of the change
   
   This cleans up the PyFlink documentation. Mostly fixing English grammar and 
adding additional cross-links. I've also added an overview page to the section. 
   
   ![Screen Shot 2020-11-11 at 1 22 22 
PM](https://user-images.githubusercontent.com/1891970/98855282-5d229400-2421-11eb-965a-de49d7298508.png)
   
   
   


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