Issue #1894772 by amateescu, alberto56: Fixed hook_menu_attribute_info() API example.
Issue #1909564 by opi: Fixed Typo in menu_attributes_menu_attribute_info() comment.
Issue #1761804 by osopolar, quicksketch: Do not add empty classes produced by leading, trailing or double spaces.
Issue #1077426 by cweagans: Followup: Fix permission checks.
Issue #1886014 by Berdir: Fixed Argument 2 passed to _menu_attributes_form_alter() must be an array, null given.
Issue #1151594 by amateescu: Fix hook_form_alter() fatal error by checking the correct form element.
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