Remove HTML `<head>` tags from DocBlock summaries in wp-admin/admin-header.php.

Also better-specify the `$hook_suffix` value in the `admin_head-$hook_suffix` hook docs per hook documentation precedent.

Props rarst for the initial patch.
See #30473

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git-svn-id: http://core.svn.wordpress.org/trunk@30524 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Two arguments in `_walk_bookmarks()`
* A code snippet in the class header for `WP_Roles`
* A code snippet in the class header for `WP_HTTP_Proxy`
* Inline code fixes in the summary and a parameter description for `WP_oEmbed::discover()`
* An argument description in `_WP_Editors::parse_settings()`
* Inline code fixes in the summary and a parameter description the `embed_oembed_discover` hook.

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30536


git-svn-id: http://core.svn.wordpress.org/trunk@30525 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Backtick-escapes a `<link>` tag in a parameter description for the `embed_oembed_discover` hook
* Inline code fixes in the summary and return description for `WP_List_Table::get_table_classes()`
* Removes HTML markup from the summary for `WP_List_Table::display_rows_or_placeholder()`
* Backtick-escapes a `<tr>` tag in a parameter description for `WP_Users_List_Table::single_row()`
* Converts non-DocBlocks into multi-line comments in `WP_Dependencies::do_items()`
* Removes HTML markup from the summary for the `comment_form_top` hook.
* Inline code and snippet fixes in the description for `wp_get_schedules()`

Props rarst for the initial patch.
See #30473.

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git-svn-id: http://core.svn.wordpress.org/trunk@30526 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Remove HTML tag from parameter description in `comment_form()`
* Remove HTML tag from a summary for the `comment_form_top` hook
* Markdown-indent a code snippet in the description for `get_linkobjectsbyname()`
* Markdown-indent a code snippet and format an unordered list in the description for `get_linkobjects()`
* Backtick-escape some inline code in the description for `clean_pre()`
* Remove HTML tag from the summary for the `rss_tag_pre` hook
* Various formatting fixes in the descriptions for `get_filesystem_method()` and `request_filesystem_credentials()`

Props rarst for the initial patch.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30538


git-svn-id: http://core.svn.wordpress.org/trunk@30527 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure the DocBlock directly precedes the hook line for the `post_edit_form_tag` action in wp-admin/edit-form-advanced.php.

This fixes the parser getting confused about which DocBlock belongs to which hook or function in this file.

See #30473.

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git-svn-id: http://core.svn.wordpress.org/trunk@30528 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements in wp-includes/formatting.php:
* Markdown-indent code snippets in the description for `wptexturize()`
* Backtick-escape inline code in a parameter description for `_wptexturize_pushpop_element()`
* Backtick-escape inline code in the description for `shortcode_unautop()`
* Backtick-escape HTML tags in the description for `convert_chars()`
* Markdown-indent a code snippet in the description for `_split_str_by_whitespace()`
* Backtick-escape an `<img>` tag in the description for `translate_smiley()`
* Add markdown formatting to the description for `links_add_target()`
* Backtick-escape HTML tags in the description for `wp_strip_all_tags()`

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30540


git-svn-id: http://core.svn.wordpress.org/trunk@30529 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Markdown-indent a code snippet in the description for `_deprecated_argument()`
* Markdown-indent a code snippet in the description for `wp_localize_script()`
* Backtick-escape HTML tags in two parameter descriptions for `wp_register()`
* Various DocBlock formatting in the description for `get_bloginfo()`
* Remove HTML tag from the summary for `_wp_render_title_tag()`
* Backtick-escape a HTML tag in the description for `get_archives_link()`
* Markdown-indent a code snippet in the description for `wp_admin_css_color()`
* Markdown-indent a code snippet in the description for the `welcome_panel` hook

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30541


git-svn-id: http://core.svn.wordpress.org/trunk@30530 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Markdown-indent a code snippet in the file header for wp-admin/install-helper.php
* Add markdown formatting and two inline `@see` tags to the description for `translate()`
* Markdown-indent a code snippet in the description for `_n_noop()`
* Remove HTML tags from the summary for `get_media_embedded_in_content()`
* Remove an HTML tag from the summary for `wpview_media_sandbox_styles()`

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30542


git-svn-id: http://core.svn.wordpress.org/trunk@30531 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Backtick-escape an HTML tag in the description for the `media_upload_mime_type_links()` hook
* Backtick-escape inline code in the description for `wp_get_active_network_plugins()`
* Remove HTML tags from the summaries for the `nav_menu_css_class`, `nav_menu_item_id`, and `nav_menu_link_attributes` hooks
* Backtick-escape HTML tags, add inline `@see` tags to parameter descriptions for the `nav_menu_css_class`, `nav_menu_item_id`, and `nav_menu_link_attributes` hooks

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30543


git-svn-id: http://core.svn.wordpress.org/trunk@30532 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Markdown-indent a code snippet in the description for `wp_salt()`
* Backtick-escape inline code in the return description for `get_avatar()`
* Various markdown formatting in the description for `add_filter()`
* Markdown-indent a code snippet in the description for `apply_filters()`
* Backtick-escape inline code in the `@see` description for `apply_filters_ref_array()`
* Backtick-escape inline code in the description for `do_action()`
* Backtick-escape variables in the parameter and return descriptions for `do_action_ref_array()`
* Various markdown formatting in the description for `get_plugin_data()`

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30544


git-svn-id: http://core.svn.wordpress.org/trunk@30533 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Backtick-escape HTML tags in several argument descriptions for `wp_link_pages()`
* Remove an HTML tag from the summary for `prepend_attachment()`
* Backtick-escape inline code in the description for `get_extended()`
* Backtick-escape inline code in the description for `get_post_type_labels()`
* Various markdown formatting in the description for `add_rewrite_endpoint()`
* Markdown-indent a code snippet in the file header for wp-includes/shortcodes.php
* Markdown-indent code snippets in the description for `add_shortcode()

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30545


git-svn-id: http://core.svn.wordpress.org/trunk@30534 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure inline code is markdown-escaped as such, HTML tags are removed from summaries, and that code snippets in descriptions are properly indented.

Affects DocBlocks for the following core elements:
* Backtick-escape code snippets in the description for `get_object_taxonomies()`
* Backtick-escape inline code in a markdown-formatted unordered list in the description for `get_taxonomy_labels()`
* Remove an HTML tag from the summary for the `Walker_Category_Checklist` class
* Remove an HTML tag from the summary for `wp_category_checklist()`, various formatting
* Remove an HTML tag from the summary for `wp_terms_checklist()`
* Backtick-escape an HTML tag in the description for `wp_popular_terms_checklist()`
* Remove HTML tags from the summaries for `page_template_dropdown()`, `parent_dropdown()`, and `wp_dropdown_roles()`
* Backtick-escape HTML tags in a parameter description for `add_settings_error()`
* Various formatting in the description and summary for `settings_errors()`
* Markdown-indent code snippets in the descriptions for `wpdb::prepare()`, `wpdb::insert()`, `wpdb::replace()`, `wpdb::update()`, and `wpdb::delete()`
* Backtick-escape an HTML tag in a parameter description for `login_header()`
* Remove HTML tags from the summaries for the `lostpassword_form` and `signup_header` hooks

Props rarst.
See #30473.

Built from https://develop.svn.wordpress.org/trunk@30546


git-svn-id: http://core.svn.wordpress.org/trunk@30535 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix the passing of commenter cookie data to the comment API so that we don't try and fetch all unapproved comments for users with no-email address when we only have an author.

Fixes #19623

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git-svn-id: http://core.svn.wordpress.org/trunk@30536 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Declare an explicit 'order' in `test_get_comments_by_user()`.

This change fixes broken builds on older versions of MySQL. See #30462.

Assertions regarding indeterminate secondary ORDER BY clauses will go in
separate test methods. See #30478.
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git-svn-id: http://core.svn.wordpress.org/trunk@30537 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix the unit tests for Imagick alpha.

These tests were written to use the `assertImageAtAlpha()` helper method, whose
internals were specific to GD. As a result, the tests could not pass. This
changeset introduces GD- and Imagick-specific versions of this method.

Props voldemortensen.
Fixes #24871.
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git-svn-id: http://core.svn.wordpress.org/trunk@30538 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Editor CSS: Add missing semicolons.

props cfoellmann.
fixes #30487.
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git-svn-id: http://core.svn.wordpress.org/trunk@30539 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update the Iris color picker to version 1.0.6.

Changes: https://github.com/Automattic/Iris/compare/1.0.4...1.0.6

props mattwiebe.
fixes #30365.
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git-svn-id: http://core.svn.wordpress.org/trunk@30540 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Don't override `Section.isContextuallyActive()` in `SidebarSection`.

This fixes a bug where empty widget areas get deactivated in the Customizer.

fixes #30378.
see #30235.
props westonruter.
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git-svn-id: http://core.svn.wordpress.org/trunk@30541 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Only show the default button in the upload control if there is a default attachment.

props celloexpressions.
see #21483.
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git-svn-id: http://core.svn.wordpress.org/trunk@30542 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Clear update caches when site language is changed.

The update screen has a re-install button which could show the wrong language locale after the site language was changed. That's because the update data is cached. 
Introduce `_wp_clear_update_cache()` as a helper function to clean up the update cache.

props SergeyBiryukov, ocean90.
fixes #30369.
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git-svn-id: http://core.svn.wordpress.org/trunk@30543 1a063a9b-81f0-0310-95a4-ce76da25c4cd