Merge "Title: Fix isRawHtmlMessage() for messages with underscores"

diff --combined includes/DefaultSettings.php
index 4ddc23e,2d1b331..928d875
--- 1/includes/DefaultSettings.php
--- 2/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@@ -6348,6 -6348,8 +6348,6 @@@ $wgDeprecationReleaseLimit = false
   * Profiler configuration.
   *
   * To use a profiler, set $wgProfiler in LocalSetings.php.
 - * For backwards-compatibility, it is also allowed to set the variable from
 - * a separate file called StartProfiler.php, which MediaWiki will include.
   *
   * Example:
   *
@@@ -8848,6 -8850,8 +8848,8 @@@ $wgCSPReportOnlyHeader = false
   * Extensions should add their messages here. The list is used for access control:
   * changing messages listed here will require editsitecss and editsitejs rights.
   *
+  * Message names must be given with underscores rather than spaces and with lowercase first letter.
+  *
   * @since 1.32
   * @var string[]
   */