Improve inline docs for functional default arguments throughout core

[DrewAPicture]

This ticket will serve as a tracking ticket for documenting functional args arrays throughout core.

[DrewAPicture]

In 28474:

Add inline documentation for default arguments in wp_insert_category().

See #28298.

[DrewAPicture]

In 28476:

Improve inline documentation for default arguments in wp_get_archives().

See #28298.

[DrewAPicture]

In 28498:

Improve inline documentation of default arguments for the_title_attribute().

See #28298.

[DrewAPicture]

In 28499:

Improve inline documentation of default arguments for post_format_meta_box(), post_tags_meta_box(), and post_categories_meta_box().

See #28298.

[DrewAPicture]

In 29230:

Convert documentation for default arguments in WP_Http::request() to a hash notation.

Also update corresponding docs for functions that leverage its arguments.

See #28298.

[DrewAPicture]

In 29459:

Document default arguments for the WP_List_Table class. Also add referenced docblocks to extending class constructors.

Props mikejolley for the initial patch.
Fixes #28679. See #28298.

[DrewAPicture]

In 30722:

Use the correct hash notation syntax for the WP_Filesystem_Base::dirlist() DocBlock.

See #28298.

[DrewAPicture]

In 30723:

Use the correct hash notation syntax for the get_pages() DocBlock.

See #28298.

[DrewAPicture]

In 30724:

Use the correct hash notation syntax for the wp_insert_term() DocBlock.

See #28298.

[DrewAPicture]

In 30725:

Improve formatting of inline documentation for get_pages().

Adds missing default values, corrects several argument types, backtick-escapes argument names used in descriptions.

See #28298.

[coffee2code]

Convert documentation for default arguments in register_sidebar() to a hash notation.

[coffee2code]

Add documentation for default arguments in register_sidebars().

[coffee2code]

Add documentation for default arguments in the_widget(). (Plus minor formatting tweaks to the function's other @params.)

[coffee2code]

Handled the remaining hash notation-related fixes for src/wp-includes/widgets.php:

• 28298.register_sidebar.diff​ converts register_sidebar() default argument docs to hash notation
• 28298.register_sidebars.diff​ adds default argument docs for register_sidebars()
• 28298.the_widget.diff​ adds default argument docs for the_widget(). Also minor formatting tweaks to the existing @param docs (to include: adding “Optional.”, adding ending periods, capitalizing descriptions, aligning descriptions, removing “@return void”)

[DrewAPicture]

In 30745:

Document the default arguments for register_sidebar() in the hash notation style.

Props coffee2code.
See #28298.

[DrewAPicture]

In 30769:

Document the default arguments for register_sidebars() in the hash notation style.

Props coffee2code.
See #28298.

[DrewAPicture]

In 30770:

Document the default arguments for the_widget() in the hash notation style.

Props coffee2code.
See #28298.

[DrewAPicture]

[30745], [30769], and [30770] cover the three patches from @coffee2code.

[DrewAPicture]

Let's call this fixed as of 4.1. New tickets for new arguments.