Commit Graph

22653 Commits

Author SHA1 Message Date
John Blackbourn
1e6a12db38 Feeds: Don't attempt to generate RSS feeds for invalid feed URLs such as wp-content/feed.
Props stevenkword, JRGould, lyubomir_popov, johnbillion
Fixes #30210

Built from https://develop.svn.wordpress.org/trunk@38929


git-svn-id: http://core.svn.wordpress.org/trunk@38872 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 21:54:31 +00:00
Dominik Schilling
7cce73a634 General: Introduce a wp_list_sort() helper function, v2.
In addition to `wp_list_filter()` for filtering a list of objects, and `wp_list_pluck()` for plucking a certain field out of each object in a list, this new function can be used for sorting a list of objects by specific fields. These functions are now all contained within the new `WP_List_Util()` class and `wp_list_sort()` is used in various parts of core for sorting lists.

This was previously committed in [38859] but got reverted in [38862] and [38863]. To fix the previous issues, `wp_list_sort()` supports now an additional argument to preserve array keys via `uasort()`.

Props flixos90, DrewAPicture, jorbin.
Fixes #37128.
Built from https://develop.svn.wordpress.org/trunk@38928


git-svn-id: http://core.svn.wordpress.org/trunk@38871 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 21:26:32 +00:00
John Blackbourn
d151e08aa6 Feeds: Greatly reduce the number of dummy posts that are generated for the Atom tests, following on from [38924].
See #35160

Built from https://develop.svn.wordpress.org/trunk@38927


git-svn-id: http://core.svn.wordpress.org/trunk@38870 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:59:30 +00:00
Weston Ruter
54465a68db Customize: Fix logic inversion in determining whether a URL is previewable which prevented previewing anything but homepage.
Fixes regression introduced in [38890].

See #38409.
Fixes #38492.

Built from https://develop.svn.wordpress.org/trunk@38926


git-svn-id: http://core.svn.wordpress.org/trunk@38869 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:53:29 +00:00
Rachel Baker
2f263fce99 Feeds: Always return a valid timestamp for the Last-Modified header of comment or post feeds.
Fixes bug where an invalid Last-Modified value would be returned in feed requests for sites that had 0 items to return. Comment or post feeds will now return the current timestamp as the Last-Modified header value.  Example: a request for the comments feed for a site without any comments.

Replaced use of the local static variable `$cache_lastcommentmodified` to store the modified date in `get_lastcommentmodified()` with the Object Cache API.  The `get_lastcommentmodified()` function returns early if there is a cached value and returns `false` if there where no comments found. Introduced `_clear_modified_cache_on_transition_comment_status()` to flush the `lastcommentmodified` cache key when a comment enters or leaves approval status. In `get_lastpostmodified()` return early if there is a cached value and return `false` if there are no posts found.

Props swissspidy, rachelbaker, dllh, leobaiano.
Fixes #38027.
Built from https://develop.svn.wordpress.org/trunk@38925


git-svn-id: http://core.svn.wordpress.org/trunk@38868 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:48:29 +00:00
John Blackbourn
92dfd29aee Feeds: Greatly reduce the number of dummy posts that are generated for the RSS2 tests. This speeds the tests up.
See #35160, #30210

Built from https://develop.svn.wordpress.org/trunk@38924


git-svn-id: http://core.svn.wordpress.org/trunk@38867 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:17:37 +00:00
Dominik Schilling
c40eadefb2 Embeds: Realign the provider list after [38693].
See #38003.
Built from https://develop.svn.wordpress.org/trunk@38923


git-svn-id: http://core.svn.wordpress.org/trunk@38866 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:16:56 +00:00
Dominik Schilling
1159185401 Upgrade: Realign $_new_bundled_files after [38921].
Built from https://develop.svn.wordpress.org/trunk@38922


git-svn-id: http://core.svn.wordpress.org/trunk@38865 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:04:31 +00:00
Dominik Schilling
6e08d8303d Upgrade: Add Twenty Seventeen to $_new_bundled_files.
This indicates that Twenty Seventeen should be installed with a WordPress upgrade.

See #38372.
Built from https://develop.svn.wordpress.org/trunk@38921


git-svn-id: http://core.svn.wordpress.org/trunk@38864 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:03:03 +00:00
Dominik Schilling
3db5fa6c90 Nav Menus: Update help text to include the two latest default themes, Twenty Sixteen and Twenty Seventeen.
See #38372.
Built from https://develop.svn.wordpress.org/trunk@38920


git-svn-id: http://core.svn.wordpress.org/trunk@38863 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:02:32 +00:00
Dominik Schilling
652742bf0a Install: Update sidebars_widgets option for Twenty Seventeen to match its three sidebars.
See #38372.
Built from https://develop.svn.wordpress.org/trunk@38919


git-svn-id: http://core.svn.wordpress.org/trunk@38862 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:01:13 +00:00
David A. Kennedy
df7e53707e Twenty Seventeen: Refresh color patterns for changes in style.css
This brings the custom colors CSS in line with the stylesheet. Some selectors were missing since many changes occurred in `style.css` a few days before the original merge to Core.

Props celloexpressions, laurelfulford.

Fixes #38389.

Built from https://develop.svn.wordpress.org/trunk@38918


git-svn-id: http://core.svn.wordpress.org/trunk@38861 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 20:00:42 +00:00
Jeremy Felt
5981dd3107 REST API: Adjust test_get_items_invalid_status_param_is_discarded() after [38911].
Previously, if an invalid post status was assigned to a media object, the object would be returned with an unchanged status. After [38911], an error response is returned.

The assertion in test_get_items_invalid_status_param_is_discarded() needs to be updated to account for the expected error response. The test name has been changed to `test_get_items_invalid_status_param_is_error_response()`.

Fixes #38417.

Built from https://develop.svn.wordpress.org/trunk@38917


git-svn-id: http://core.svn.wordpress.org/trunk@38860 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 19:34:30 +00:00
Jeremy Felt
8972cb70b6 Options: Make $passed_default available in remaining default_option_{$option} filter.
Pass `false` as the `$passed_default` value when the `default_option_{$option}` filter is applied in `update_option` as no default is ever passed.

This resolves an error in tests where the 3rd parameter is not available to `filter_default_option()`.

Fixes #38176.

Built from https://develop.svn.wordpress.org/trunk@38916


git-svn-id: http://core.svn.wordpress.org/trunk@38859 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 19:23:32 +00:00
Jeremy Felt
680f14fcd1 Multisite: Replace get_blog_details() in wp-includes/ms-blogs.php with get_site().
Props flixos90.
See #37102.
Fixes #38351.

Built from https://develop.svn.wordpress.org/trunk@38915


git-svn-id: http://core.svn.wordpress.org/trunk@38858 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 18:50:30 +00:00
Jeremy Felt
84f25462e1 Multisite: Replace get_blog_details() in get_active_blog_for_user() with get_site().
Props flixos90.
Fixes #38355.

Built from https://develop.svn.wordpress.org/trunk@38914


git-svn-id: http://core.svn.wordpress.org/trunk@38857 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 18:06:29 +00:00
Jeremy Felt
4c0d82d653 Multisite: Introduce tests for get_active_blog_for_user().
Props flixos90.
See #38355.

Built from https://develop.svn.wordpress.org/trunk@38913


git-svn-id: http://core.svn.wordpress.org/trunk@38856 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 18:03:29 +00:00
Andrea Fercia
48b12e9dd6 Menus: Improve the HTML semantics of the "Menu Settings" section.
- removes the previous markup based on a definition list
- groups checkboxes in `fieldset` elements with a `legend`
- simplifies the CSS lowering selectors specificity

Props xavortm.

Fixes #38023.

Built from https://develop.svn.wordpress.org/trunk@38912


git-svn-id: http://core.svn.wordpress.org/trunk@38855 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 17:29:30 +00:00
Joe Hoyle
e8a311ed02 REST API: Validate posts status enum
Currently we are using a different validate callback, so the `enum` is not interpretted. We just have to fallback to the result of `rest_validate_request_arg` in our custom wrapper function.

Fixes #38417.

Built from https://develop.svn.wordpress.org/trunk@38911


git-svn-id: http://core.svn.wordpress.org/trunk@38854 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 17:13:28 +00:00
Joe Hoyle
5f777155f2 Options: Add 'default' to register_setting
Add a `default` argument to `register_setting` that will be used an the default option value viet `get_option()` in the event of no other option being specified. This means (if chosen) developers can define their default once via `register_option` and not have to duplicate the value every time they make a call to `get_option()`.

Props rmccue, jorbin, jtsternberg.
Fixes #38176.

Built from https://develop.svn.wordpress.org/trunk@38910


git-svn-id: http://core.svn.wordpress.org/trunk@38853 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 17:08:29 +00:00
Tammie Lister
67dbadd476 Twenty Seventeen: Display scroll down arrow when no menu
This improves scrollability without a menu.

Props nnaimov, melchoyce, davidakennedy
Fixes #38392


Built from https://develop.svn.wordpress.org/trunk@38909


git-svn-id: http://core.svn.wordpress.org/trunk@38852 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 16:51:35 +00:00
Gary Pendergast
a62d04afd6 Tests: Fix a PHP notice introduced in [38907].
`WP_DEFAULT_THEME` was being defined in the wrong location.

Also, if WordPress has the original "default" theme installed, ensure that our test theme overrides it.

Props swissspidy for daring to dive into Themes of WordPress Past.
See #31550, #38457.


Built from https://develop.svn.wordpress.org/trunk@38908


git-svn-id: http://core.svn.wordpress.org/trunk@38851 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 11:06:30 +00:00
Gary Pendergast
3ce2dd4131 Tests: Use a minimal theme for tests.
This functionality was originally added in [38858], using `symlink()` to put a link to the theme in WordPress' `themes` directory. Unfortunately, not all installs have write access to the `themes` directory, causing unit tests to fail.

The new method is to add the test theme directory to `$wp_theme_directories`, and fix the handful of tests that don't expect `$wp_theme_directories` to have multiple entries.

The test install/bootstrap routines now also check that `WP_DEFAULT_THEME` is defined, in case the tests are being run on a system that hasn't upgraded its' `wp-tests-config.php`.

See #31550.
Fixes #38457.


Built from https://develop.svn.wordpress.org/trunk@38907


git-svn-id: http://core.svn.wordpress.org/trunk@38850 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 10:25:53 +00:00
Weston Ruter
30a71555cb Customize: Allow page stubs to be created via dropdown-pages controls in the Static Front Page section.
This ability was previously added to nav menus via the available page items panel. The "Add New Page" button only appears when the `allow_addition` control param is supplied as `true`. Code is adapted from the Customize Posts feature plugin.

Props celloexpressions, westonruter.
See #38013, #34923.
Fixes #38164.

Built from https://develop.svn.wordpress.org/trunk@38906


git-svn-id: http://core.svn.wordpress.org/trunk@38849 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 06:31:31 +00:00
Jeremy Felt
6a0ca394e8 Multisite: Replace get_blog_details() with get_site() in is_user_member_of_blog().
Props flixos90.
Fixes #38358.

Built from https://develop.svn.wordpress.org/trunk@38905


git-svn-id: http://core.svn.wordpress.org/trunk@38848 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 06:02:35 +00:00
Jeremy Felt
6e1c166dfb Multisite: Replace get_blog_details() in ms_site_check() with get_site().
Props flixos90.
Fixes #38357.

Built from https://develop.svn.wordpress.org/trunk@38904


git-svn-id: http://core.svn.wordpress.org/trunk@38847 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 05:55:30 +00:00
Jeremy Felt
390dc4b345 Multisite: Replace get_blog_details() in add_user_to_blog() with get_site().
Adds tests for `add_user_to_blog()`.

Props flixos90.
Fixes #38356.

Built from https://develop.svn.wordpress.org/trunk@38903


git-svn-id: http://core.svn.wordpress.org/trunk@38846 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 05:49:29 +00:00
Jeremy Felt
749b480de0 Multisite: Replace get_blog_details() with get_site() in get_dashboard_blog().
Props dipesh.kakadiya.
Fixes #38353.

Built from https://develop.svn.wordpress.org/trunk@38902


git-svn-id: http://core.svn.wordpress.org/trunk@38845 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 05:05:33 +00:00
Weston Ruter
afe90360b5 Customize: Prevent absent site icon link from outputting an empty string as href in customizer; use /favicon.ico as fallback.
An empty string causes some browsers to use the current URL as the `href`. When using `history.replaceState()` Chrome will re-fetch the favicon with each call, meaning that `customize.php` gets hit with wasted requests which tax the server.

Fixes #38377.

Built from https://develop.svn.wordpress.org/trunk@38901


git-svn-id: http://core.svn.wordpress.org/trunk@38844 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 04:47:29 +00:00
Weston Ruter
a1777db166 Customize: Skip attaching expansion event handlers to section containers with the cannot-expand class.
Props kkoppenhaver, celloexpressions.
Fixes #37980.

Built from https://develop.svn.wordpress.org/trunk@38900


git-svn-id: http://core.svn.wordpress.org/trunk@38843 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 04:36:39 +00:00
Dion Hulse
0314e29667 Drop the requirement for the entry points to WordPress to be parsable by PHP4.
Previously we ensured that the entry points to WordPress were parsable by PHP4 in order to display a friendly not-supported-php error message.
However, for the last two years the main entry points have not actually parsed, and we've only added extra parse errors since it last worked in 3.9, so it's time we just remove this 'feature'.
The PHP version checks are still there for PHP 5.0/5.1, and so it's inplace when we eventually drop PHP 5.2 support.

See #29489.

Built from https://develop.svn.wordpress.org/trunk@38899


git-svn-id: http://core.svn.wordpress.org/trunk@38842 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 03:15:30 +00:00
Dion Hulse
2b788037c7 Upgrade: Don't fail a core update just because readme.html or license.txt couldn't be modified.
A number of locked down installs remove `readme.html` or make it inaccessible which would result in an update failure.

Props polevaultweb for the initial patch.
Fixes #31420.

Built from https://develop.svn.wordpress.org/trunk@38898


git-svn-id: http://core.svn.wordpress.org/trunk@38841 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 02:24:31 +00:00
Andrew Ozz
913926c1bd TinyMCE: make keyboard shortcuts more discoverable by adding them to the buttons tooltips and in the Formats drop-down.
Props mor10, azaozz.
Fixes #38063.
Built from https://develop.svn.wordpress.org/trunk@38897


git-svn-id: http://core.svn.wordpress.org/trunk@38840 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 01:40:31 +00:00
Dion Hulse
7d24c2cb2a Revert the svn:ignore changes in [38394] which was missed in the original revert.
See #36335

Built from https://develop.svn.wordpress.org/trunk@38896


git-svn-id: http://core.svn.wordpress.org/trunk@38839 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 01:13:29 +00:00
Dion Hulse
7ac6b18d89 HTTP: Call mbstring_binary_safe_encoding() before making a request with Requests to avoid issues with mbstring.func_overload.
Props SergeyBiryukov.
Fixes #38226.

Built from https://develop.svn.wordpress.org/trunk@38894


git-svn-id: http://core.svn.wordpress.org/trunk@38837 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 00:45:29 +00:00
Dion Hulse
e8211f783a Docs: Correct a number of typos/spelling mistakes in inline comments.
Props ottok.
Fixes #38464.

Built from https://develop.svn.wordpress.org/trunk@38893


git-svn-id: http://core.svn.wordpress.org/trunk@38836 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-25 00:38:35 +00:00
Tammie Lister
23a4550b0d Twenty Seventeen: Resolves the pin icon having variations
This fixes the pin icon having variations in position and size depending on screen and device. 

Props metodiew, mbelchev, davidakennedy
Fixes #38407


Built from https://develop.svn.wordpress.org/trunk@38892


git-svn-id: http://core.svn.wordpress.org/trunk@38835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 22:31:12 +00:00
Andrew Ozz
1a7a00d14f TinyMCE: change the icon and tooltip for the remove link button in the inline link toolbar.
Props hardeepasrani, ocean90, magicroundabout, iseulde.
Fixes 37278.
Built from https://develop.svn.wordpress.org/trunk@38891


git-svn-id: http://core.svn.wordpress.org/trunk@38834 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 21:59:22 +00:00
Weston Ruter
885d1dd89d Customize: Harden url matching to account for varying ports and ensuring matching base pathname for allowed urls
Fixes #38409.

Built from https://develop.svn.wordpress.org/trunk@38890


git-svn-id: http://core.svn.wordpress.org/trunk@38833 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 20:07:31 +00:00
Weston Ruter
1129311849 Customize: Fix live preview button in theme details modal so it includes target theme.
Fixes issue introduced in [38813].

Props celloexpressions.
See #37661.
Fixes #38475.

Built from https://develop.svn.wordpress.org/trunk@38889


git-svn-id: http://core.svn.wordpress.org/trunk@38832 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 19:15:29 +00:00
Tammie Lister
e2c22fa367 Twenty Seventeen: iPad mini, iPhone 5 search form rendering issues fix
On the these devices, there is an issue with the button rendering for the search form. This resolves that.

Props Caspie, alex27, davidakennedy
Fixes #38396


Built from https://develop.svn.wordpress.org/trunk@38888


git-svn-id: http://core.svn.wordpress.org/trunk@38831 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 19:11:35 +00:00
Weston Ruter
d93636bd11 Customize: Disable theme installation in multisite.
Props celloexpressions, iamfriendly.
Fixes #38370.

Built from https://develop.svn.wordpress.org/trunk@38887


git-svn-id: http://core.svn.wordpress.org/trunk@38830 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 18:17:39 +00:00
David A. Kennedy
5452a6a21d Twenty Seventeen: Fix smooth scrolling skip link
The link was scrolling too far. The main problem was that the `menuTop` variable lost it's initial definition of `0`, so all future subtractions were failing.

Props tywayne.

Fixes #38448.

Built from https://develop.svn.wordpress.org/trunk@38886


git-svn-id: http://core.svn.wordpress.org/trunk@38829 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 17:59:47 +00:00
Tammie Lister
bb91701a02 Twenty Seventeen: Fixes incorrect use of _x()
There is an incorrect use in twentyseventeen_posted_on(). This fixes that.

Props ocean90, dineshc, mbelchev, davidakennedy
Fixes #38383


Built from https://develop.svn.wordpress.org/trunk@38885


git-svn-id: http://core.svn.wordpress.org/trunk@38828 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 17:27:51 +00:00
John Blackbourn
2dfc3a7572 General: Correct the docs for the default HTTP status code used by wp_die().
See #37770

Built from https://develop.svn.wordpress.org/trunk@38884


git-svn-id: http://core.svn.wordpress.org/trunk@38827 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 13:13:58 +00:00
Gary Pendergast
b21d1cb6e6 General: Check to see that the PHP-XML module is enabled before using XML functions.
There are a handful of places where we don't check that the XML functions exist before we use them. Ubuntu's PHP 7 packages don't include PHP-XML by default, increasing the chance of this causing issues.

Props kraftbj, markoheijnen.
Fixes #37122.


Built from https://develop.svn.wordpress.org/trunk@38883


git-svn-id: http://core.svn.wordpress.org/trunk@38826 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 04:45:31 +00:00
Gary Pendergast
efaf9bae66 Menus: Add the menu-item-home class to the static front page.
When a site is using a static front page, and that page is in a menu, it isn't given the CSS class `menu-item-home`, contrary to the developer documentation.

Props christophherr.
Fixes #35272.


Built from https://develop.svn.wordpress.org/trunk@38882


git-svn-id: http://core.svn.wordpress.org/trunk@38825 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-24 00:32:32 +00:00
Andrea Fercia
46bae0275c Customize: Keep previously uploaded header images in place.
On the Header Image section, the previously uploaded images disappeared off-screen
when using the keyboard to navigate and the remove "X" button got keyboard focus.
Changing the off-screen CSS technique used for the "X" buttons fixes it.

- improves the focus style on the previously uploaded and suggested images
- removes a `tabindex="0"` attribute from the current header image

Fixes #38156.

Built from https://develop.svn.wordpress.org/trunk@38881


git-svn-id: http://core.svn.wordpress.org/trunk@38824 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-23 19:57:32 +00:00
Andrea Fercia
5c555e5d10 Accessibility: Improve the Tags meta box accessibility.
- changes the "X" links in buttons, improves their color contrast ratio and focus style
- adds screen reader text "Remove item: + tagname"
- uses `wp.a11y.speak()` to give screen reader users feedback when adding/removing tags
- makes the `tagcloud-link` toggle a button, with an `aria-expanded` attribute to indicate the tag cloud collapsed/expanded state
- changes colors for the autocomplete highlighted option in order to have a better color contrast ratio
- reduces the font size for the autocomplete on Press This
- removes CSS related to the old `suggest.js` from Press This

Props joedolson, cgrymala, azaozz, afercia.
Fixes #27555.

Built from https://develop.svn.wordpress.org/trunk@38880


git-svn-id: http://core.svn.wordpress.org/trunk@38823 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-23 18:16:42 +00:00
John Blackbourn
4e65c0cfb4 REST API: Correct a documentation typo.
Props Zuige
Fixes #38458
See #38456

Built from https://develop.svn.wordpress.org/trunk@38879


git-svn-id: http://core.svn.wordpress.org/trunk@38822 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-23 15:56:30 +00:00