My user is marked as mentioned when a word contains my username

### OS/platform debian testing ### Emacs version and provenance apt install emacs ### Emacs command emacs ### Emacs frame type both ### Ement package version and provenance straight, using ement from git commit 57ac20036e6b3574512188dfd10f0a9432348a5c ### Actions taken No action per se, I simply get messages that supposedly mention me when words containing my username are used. ### Observed results My username is sam, so it matches a words like same, sample etc <img width="576" height="87" alt="Image" src="https://github.com/user-attachments/assets/22b59557-c16d-4788-8354-400872950fcd" /> ### Expected results I would expect only the message with my username to be matched as a mention ### Backtrace ```elisp ``` ### Etc. I worked around this in [my fork](https://github.com/Konubinix/ement.el/commit/d96a760ecd85fec134bb38d72f7fea346cc9157e) by adding \b around the regexp in `ement-room--event-mentions-user-p` ```lisp (when body (cl-macrolet ((matches-body-p (form) `(when-let ((string ,form)) (string-match-p (format "\\b%s\\b" (regexp-quote string)) body)))) (or (matches-body-p (ement-user-username user)) (matches-body-p (ement--user-displayname-in room user)) (matches-body-p (ement-user-id user))))))) ``` Now I get the appropriate behavior <img width="570" height="45" alt="Image" src="https://github.com/user-attachments/assets/c95512e6-baf5-4975-bc9f-8396a01423f6" />