Issue #1811520 by JacobSanford, lirantal: Add section tags to theme, hook_menu, and t documentation.

Issue #1893530 by alippai: Document that bundles element is not required for one-bundle entities in hook_entity_info

Issue #1629994 by Aron Novak, oadaeh, yurtboy, jhodgdon, kingandy: Fixed Mail functions reference obsolete RFC.

Issue #1441180 by scor, avr, Devin Carlson: Fixed hook_requirements() REQUIREMENT_ERROR broadcasting.

Issue #1802844 by antojose: Fixed 'have to' repeated twice as 'have to have to' in the comment for the function hook_module_implements_alter() in system.api.php.

Issue #1154382 by Berdir, barraponto, acouch, swentel, LoMo, DamienMcKenna, chx: Fixed View mode no longer can be changed.

Issue #1513580 by matt2000: Update hook_init and hook_boot docs to say whether themes are loaded when they run

Issue #720630 by tim.plunkett, kid_icarus, tsphethean: Fix up docs for watchdog, hook_watchdog, and watchdog constants

Issue #1409052 by mkadin: Fixed hook_menu() should state that auto-loaders should return FALSE to indicate nothing found and trigger a 404.

Issue #800434 by pillarsdotnet, plach, bart.hanssens: Added drupal_mail(), allow hook_mail_alter() implementation to cancel mail.