DOC: "Next" link from user_guide/io.rst goes to read_sql_table API pa…
…ge (#30332)
Can you post a screenshot of what the "Next" text looks like when you build it locally? ![Screenshot from 2019-12-19 22-07-11](https://user-images.githubusercontent.com/24843773/71191316-31983780-22ac-11ea-8679-d311a755a34b.png)
Here is the screenshot. Thanks @souvik3333 