Upgrader: Copy wp-includes/version.php over last, to avoid an installation failing with the new version.php in place. Fixes #25860

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Upgrader: Remove two stray spaces. See #25860

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Upgrader: Remove some debug from r27336. See #25860

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Upgrader: Remove more debug from r27336. See #25860

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Plupload: remove the (old) plupload.silverlight.xap, remove the "executable" prop from Moxie.xap, see #25663
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Inline documentation for hooks in wp-includes/rewrite.php.

Props mboynes for the initial patch.
Fixes #26095.

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Inline documentation for hooks in wp-admin/includes/class-wp-users-list-table.php.

Props leewillis77.
Fixes #26203.

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Add the ability to drag and drop files directly onto the editor.

The file will then begin to upload and the media manager will open.

props kovshenin.
see #19845.

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Strip backslashes, not just forward slashes, from untrailingslashit().

trailingslashit() will now remove any forward or backslashes from the end of a string before appending a forward slash.

props knutsp, willmot.
fixes #22267.

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TinyMCE: remove box-shadow from the "more" and "nextpage" placeholder images, props avryl, see #24067
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