Inline docs syntax fixes following [28978].

See #28740.

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git-svn-id: http://core.svn.wordpress.org/trunk@28803 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct the usage of the variable passed to `wp_install_download_language_pack()` and kill an unused local variable. Props michalzuber. Also avoid using the `$_REQUEST` superglobal in this function. See #28577.
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git-svn-id: http://core.svn.wordpress.org/trunk@28804 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove some unnecessary empty space in the media library grid view. props adamsilverstein. see #24716.

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git-svn-id: http://core.svn.wordpress.org/trunk@28805 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Language on install: Docs and naming cleanups. see #28577.

Built from https://develop.svn.wordpress.org/trunk@29018


git-svn-id: http://core.svn.wordpress.org/trunk@28806 1a063a9b-81f0-0310-95a4-ce76da25c4cd