Issue #1957020 by JSCSJSCS, greg.1.anderson: drush sql-sync with --create-db does not work and can overwrite MySQL default databases
Issue #1615450 by greg.1.anderson, jhedstrom: Throw an error if no site alias is found
Fix sporadic fail in outputformat test due to cached old environment being out of date according to update.drupal.org
Issue #1870580 by kevin.dutra: Drupal $base_url may not be set correctly
Issue #1899332 by TravisCarden: Improve code docs for drush_get_arguments().
Issue #1957476 by joestewart: Fixed Followup to 1851970: Remove the text referencing the shorthand for revisions.
Issue #1509936 by juampy, Danylo Dragan | filler: Fixed archive dump ard puts default.settings.php into the archive twice which errors on archive restore arr.
spelling fix.