Hide dart:web_sql in generated dartdocs

[kevmoo]

We plan on eliminating the API soon, but we can start by hiding it from our docs!

[sigmundch]

@devoncarew @jcollins-g what would be the right process to get this library hidden?

(also, procedural question: what's the best way to track issues that directly affect dartdoc? Should we file this also under https://github.com/dart-lang/dartdoc?)

[jcollins-g]

the quickest way to hide a library is to use @nodoc directly inside the documentation comment. You can also use the nodoc field in dartdoc_options.yaml.

https://github.com/dart-lang/dartdoc#excluding-from-documentation

[jcollins-g]

Note that @nodoc, a bit confusingly, is not actually an annotation, just a literal string inside the documentation comment.

[jcollins-g]

Issues that require dartdoc changes are best filed under https://github.com/dart-lang/dartdoc.

[sigmundch]

Great, thanks!

[devoncarew]

I believe there's prior art here in the sdk - we're excluding docs for dart:cli.