Ensure the mixed type of `string|int` is reflected on the `$title` parameter in `wp_die()`.

The ability to pass an error code as short-hand to the `$title` and `$args` parameters was added in r30355. Changes also include cleaned-up formatting and line-wraps for other documentation in the DocBlock.

See [30355]. Fixes #10551.

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git-svn-id: http://core.svn.wordpress.org/trunk@30376 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Clarify/correct inline documentation in wp-includes/l10n.php.

* Add a missing `@return` description for `load_default_textdomain()`
* Clarify the `@param` description for `$locale` with an inline `@see` tag
* Ensure the correct parameter variable is used when documenting `$args` for `wp_dropdown_languages()`

Props camdensegal.
Fixes #30385.

Built from https://develop.svn.wordpress.org/trunk@30380


git-svn-id: http://core.svn.wordpress.org/trunk@30377 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add missing documentation for the `$password` parameter, passed to the `check_password` hook.

Props coffee2code.
Fixes #30311.

Built from https://develop.svn.wordpress.org/trunk@30381


git-svn-id: http://core.svn.wordpress.org/trunk@30378 1a063a9b-81f0-0310-95a4-ce76da25c4cd