use MOTD_BANNED_TAGS in motd editor view

app/__init__.py

@@ -7,7 +7,7 @@ from .routes.threads import get_post_url
 from .constants import (
     PermissionLevel, permission_level_string,
     InfoboxKind, InfoboxHTMLClass,
-    REACTION_EMOJI,
+    REACTION_EMOJI, MOTD_BANNED_TAGS,
     )
 from .lib.babycode import babycode_to_html, EMOJI, BABYCODE_VERSION
 from datetime import datetime
@@ -176,6 +176,7 @@ def create_app():
             "__commit": commit,
             "__emoji": EMOJI,
             "REACTION_EMOJI": REACTION_EMOJI,
+            "MOTD_BANNED_TAGS": MOTD_BANNED_TAGS,
         }
 
     @app.context_processor

app/constants.py

@@ -48,7 +48,7 @@ REACTION_EMOJI = [
 ]
 
 MOTD_BANNED_TAGS = [
-    'img', 'spoiler', 'mention'
+    'img', 'spoiler', '@mention'
 ]
 
 def permission_level_string(perm):

app/templates/mod/motd.html

@@ -9,7 +9,7 @@
     <label for="title">Title</label>
     <input name="title" id="title" type="text" required autocomplete="off" placeholder="Required" value="{{ current.title }}"><br>
     <label for="body">Body</label>
-    {{ babycode_editor_component('body', ta_placeholder='MOTD body (required)', banned_tags=['img', 'spoiler', '@mention'], prefill=current.body_original_markup) }}
+    {{ babycode_editor_component('body', ta_placeholder='MOTD body (required)', banned_tags=MOTD_BANNED_TAGS, prefill=current.body_original_markup) }}
     <input type="submit" value="Save">
     <input class="critical" type="submit" formaction="{{ url_for('mod.motd_delete') }}" value="Delete MOTD" formnovalidate {{"disabled" if not current else ""}}>
   </form>