add mentions

app/__init__.py

@@ -40,10 +40,11 @@ def create_admin():
 
 def create_deleted_user():
     username = "DeletedUser"
-    if Users.count({"username": username}) == 0:
+    if Users.count({"username": username.lower()}) == 0:
         print("Creating DeletedUser")
         Users.create({
-            "username": username,
+            "username": username.lower(),
+            "display_name": username,
             "password_hash": "",
             "permission": PermissionLevel.SYSTEM.value,
         })
@@ -61,7 +62,7 @@ def reparse_babycode():
         with db.transaction():
             for ph in post_histories:
                 ph.update({
-                    'content': babycode_to_html(ph['original_markup']),
+                    'content': babycode_to_html(ph['original_markup']).result,
                     'format_version': BABYCODE_VERSION,
                     })
         print('Re-parsing posts done.')
@@ -76,7 +77,7 @@ def reparse_babycode():
         with db.transaction():
             for user in users_with_sigs:
                 user.update({
-                    'signature_rendered': babycode_to_html(user['signature_original_markup']),
+                    'signature_rendered': babycode_to_html(user['signature_original_markup']).result,
                     'signature_format_version': BABYCODE_VERSION,
                 })
         print(f'Re-parsed {len(users_with_sigs)} user sigs.')
@@ -90,7 +91,7 @@ def reparse_babycode():
         with db.transaction():
             for motd in stale_motds:
                 motd.update({
-                    'body_rendered': babycode_to_html(motd['body_original_markup'], banned_tags=MOTD_BANNED_TAGS),
+                    'body_rendered': babycode_to_html(motd['body_original_markup'], banned_tags=MOTD_BANNED_TAGS).result,
                     'format_version': BABYCODE_VERSION,
                 })
         print('Re-parsing MOTDs done.')
@@ -206,7 +207,7 @@ def create_app():
 
     @app.template_filter('babycode')
     def babycode_filter(markup):
-        return babycode_to_html(markup)
+        return babycode_to_html(markup).result
 
     @app.template_filter('extract_h2')
     def extract_h2(content):