Issue #2383491 by er.pushpinderrana, Sweetchuck: Inaccurate documentation - hook_image_toolkits()
Issue #2382801 by er.pushpinderrana, Liam Morland: Improve documentation for module_exists()
Issue #2377879 by er.pushpinderrana, yakoub: hook_user_view documentation has incorrect piece
Issue #2208649 by joachim, er.pushpinderrana: document queue worker callback