[3.7] bpo-21063: Improve module synopsis for for various modules (GH-17363)

[miss-islington]

(cherry picked from commit f8a6316)

Co-authored-by: Sanchit Khurana 54467174+GeniusLearner@users.noreply.github.com

https://bugs.python.org/issue21063

Automerge-Triggered-By: @brettcannon

[miss-islington]

@GeniusLearner and @brettcannon: Status check is done, and it's a failure ❌ .

[terryjreedy]

@brettcannon Travis backport CI is broken; I got the same failure starting yesterday. I cc'ed you a post to core-workflow about this. I posted yesterday to pydev but got no immediately useful response. I have no idea who is directly responsible for keeping the workflow system running or why the failure mode is different for 3.8 and 3.7.

[brettcannon]

@terryjreedy unfortunately for Travis I'm not sure if anyone is. We could stop making Travis required if no one is able to figure out a fix.

[terryjreedy]

Travis with master is not a problem. So if that passes, a backport failure, when Travis is working right, while possible, is unlikely. I have a vague memory that Zach Ware has worked on the Travis .yml, although it is not clear is that is the problem.

[bedevere-bot]

@brettcannon: Please replace # with GH- in the commit message next time. Thanks!