This reverts commit 5a9ce8cf.

Issue #2613146 by msankhala, rasikap, zuhair_ak: filter_test_filter_format_insert() has the wrong "implements" documentation

Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #1779026 by dagmar, tim.plunkett, sun, heyrocker: Convert Text Formats to Configuration System.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

- Patch #358437 by David_Rothstein, Berdir, sun: filter system security fixes from SA-2008-073 not applied to Drupal 7.x.

- Patch #502190 by jhodgdon, stella, sun: hook implementation headers out of compliance with standards.

- Patch #559658 by sun, dropcube: store filter settings per format, general API clean-up and documentation improvements.

- Patch #428296 by dropcube, sun, catch: filter system doesn't communicate with other modules about filter format changes/deletions.