Drupal 7.18.
Merge branch '7.17-security' into 7.x
Issue #1868206 by kiamlaluno: Fixed Word is repeated.
Issue #1606946 follow-up by David_Rothstein: Remove note about const from D7 docs since we don't require PHP 5.3.
Issue #1629994 by Aron Novak, oadaeh, yurtboy, jhodgdon, kingandy: Fixed Mail functions reference obsolete RFC.
Issue #1854620 by marvin_B8, droplet: Fixed hook_menu_local_tasks_alter() help texts.
Issue #1873608 by David_Rothstein: Improve documentation of format_string() to emphasize that it is used to prepare variables for HTML display.
Issue #1874342 by erikwebb: Fixed Undefined constant STEAM_WRAPPERS_LOCAL used in file_get_stream_wrappers() documentation.
Issue #1534674 by plach, slowflyer: Fixed Comment field language is completely broken.
Issue #1741386 by lazysoundsystem, rasmusluckow, andypost, Lars Toomre, dcam: Removing t() from asserts in simpletests in book module.
Issue #1864188 by johnshortess | hefox: Fixed user_filters() invokes hook_permission() with argument 'permission' ($function('permission')).
Issue #1864360 by oadaeh: Fixed Clean up some inconsistencies with @link...@endlink.
Issue #1864216 by larowlan, marvin_B8: Fixed No docblock for several functions in user.module.
Add link to change notification for comment field language fix to CHANGELOG.txt.
Issue #1333400 by Albert Volkman, Chi: Add parameter docs for hook_install_tasks
Issue #1873608 by David_Rothstein: Clarify documentation on when to use t vs format_string
Issue #1862198 by plopesc: Make it clearer where to find placeholder docs for t
Issue #1143460 by WorldFallz, Dave Reid, colette, typhonius, David_Rothstein | localhost: Fixed hook_file_download_access_alter() missing entity argument (by allowing an additional context argument to be passed to drupal_alter()).
Issue #1815930 by slashrsm, gbrands, amontero: Fixed Update watchdog message in file_unmanaged_copy() with correct string/variable replacement values.
Issue #1857956 by catch, David_Rothstein: Do not re-prepare comment update timestamp if it's the same as the created timestamp (performance improvement).