Fixed linting

Preparing release version 3.9.3

Preparing release version 3.9.2

make note about the unpublished 3.9.0 release

Preparing release version 3.9.0

Preparing release version 3.8.2

Preparing release version 3.8.1

Preparing release version 3.8.0

Preparing release version 3.7.4

Fix collection example docs