Twenty Fourteen: remove unneeded `.single-attachment` body class selectors, props iamtakashi. Fixes #25541, see #25506.
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Twenty Fourteen: remove unnecessary `no-sidebar` class value in front page template. Props iamtakashi, fixes #25543.
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Upgrader: Create Directories with a minimum of 0755 and files with a minimum of 0644 when upgrading, which matches pre-3.7 behaviour. Fixes #20069

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Twenty Fourteen: minor color contrast and a11y fixes, see #25054.
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Show a label for the "Home" page nav menu item checkbox. props SergeyBiryukov. props ericlewis for the initial patch. fixes #25410.

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Twenty Fourteen:  a11y fix for keyboard navigation and Skip Content link, see #25054.
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Twenty Fourteen: remove title attributes for better accessibility. Props sabreuse for original patch, see #25054.
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Make sure when resizing an image according to ratio we do not end up with a zero-pixel width or height.

props plocha.
fixes #25038.

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git-svn-id: http://core.svn.wordpress.org/trunk@25657 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Only add one body class when multiple post types manage to be present for a post type archive due to pre_get_posts manipulation.

fixes #25341.

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