Fix remove_notifications() for strings with multiple occurrences.

utils.py

@@ -44,10 +44,13 @@ def remove_notifications(text):
         "soren",
     ]
 
+    def replace(match):
+        # Insert <i></i> after the first character of the matched string.
+        user = match.group()
+        return f"{user[:1]}<i></i>{user[1:]}"
+
     for user in notified_users:
-        match = re.search(user, text, re.IGNORECASE)
-        if match:
-            text = f"{text[:match.start() + 1]}<i></i>{text[match.start() + 1:]}"
+        text = re.sub(user, replace, text, flags=re.IGNORECASE)
 
     return text