Docs: Small inline documentation corrections following [48121].

Also, remove the `version` argument from the `wp.deprecated()` call in `password-strength-meter.js`. This argument is for specifying the version a feature will be removed, not when the feature was removed.

Props hareesh-pillai.
Fixes #50413.
Built from https://develop.svn.wordpress.org/trunk@48124


git-svn-id: https://core.svn.wordpress.org/trunk@47893 1a063a9b-81f0-0310-95a4-ce76da25c4cd