No way to get to the examples from docs.rs

[alamb]

Note: migrated from original JIRA: https://issues.apache.org/jira/browse/ARROW-11863

https://docs.rs/datafusion/3.0.0/datafusion/ has a tantalizing piece of text about the examples, but no link or explanation of how to find them

!Screen Shot 2021-03-04 at 2.51.54 PM.png!

The examples are at https://github.com/apache/arrow/tree/master/rust/datafusion/examples

The ideal outcome would be to point people somehow at the examples directory for the version of the docs they are looking at in docs.rs. The ok, outcome would be to point the docs from docs.rs always at master.

[alamb]

Comment from Daniël Heres(Dandandan) @ 2021-03-22T17:30:12.744+0000:

An url based on the version would also be cool, for example:

https://github.com/apache/arrow/tree/apache-arrow-3.0.0/rust/datafusion/examples