Merge "DateTimeFormatter: Use mw.RegExp.escape from 'mediawiki.RegExp'"

diff --combined resources/Resources.php
index ec3a5ba,723c1a5..65e6855
--- 1/resources/Resources.php
--- 2/resources/Resources.php
+++ b/resources/Resources.php
@@@ -840,7 -840,6 +840,7 @@@ return 
                ],
                'dependencies' => [
                        'mediawiki.language',
 +                      'mediawiki.RegExp',
                ],
                'targets' => [ 'desktop', 'mobile' ],
        ],
@@@ -2673,6 -2672,7 +2673,7 @@@
                        'period-pm',
                ],
                'dependencies' => [
+                       'mediawiki.RegExp',
                        'oojs-ui-core',
                        'oojs-ui.styles.icons-moderation',
                        'oojs-ui.styles.icons-movement',