bpo-20364: Improve sqlite3 placeholder docs

[erlend-aasland]

Co-authored-by: Terry J. Reedy

https://bugs.python.org/issue20364

[erlend-aasland]

@berkerpeksag, @terryjreedy: would you mind taking a look at this?

[Fidget-Spinner]

I'm not an sqllite3 expert by any means, so I'll leave verifying the content's accuracy to someone else ;).

[erlend-aasland]

Thanks for reviewing, @Fidget-Spinner, I appreciate your comments 😃

[Fidget-Spinner]

LGTM! Thanks for improving the docs :).

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[erlend-aasland]

I have made the requested changes; please review again.

[bedevere-bot]

Thanks for making the requested changes!

@berkerpeksag: please review the changes made to this pull request.

[berkerpeksag]

Ah, can you also fix the following error?

Warning, treated as error: [library/sqlite3:98] ":name" found in "cur.execute("select * from lang where lang_name=:name and lang_age=:age"," Makefile:49: recipe for target 'build' failed 

You'll probably need to update Doc/tools/susp-ignored.csv.

[erlend-aasland]

You'll probably need to update Doc/tools/susp-ignored.csv.

Oh, I've never seen this before :) c2366b5 did not fix it, but I discovered the make suspicious target in Doc. Fix comin' up pretty soon.

UPDATE: Done. Fixed in f3ed86e

[erlend-aasland]

Since this is a doc update, we'd want to backport it to 3.9 and 3.8, right?

[miss-islington]

Thanks @erlend-aasland for the PR, and @berkerpeksag for merging it 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

[bedevere-bot]

GH-25402 is a backport of this pull request to the 3.9 branch.

[erlend-aasland]

Thanks for reviewing, @berkerpeksag !