Update textbook.en.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/30.classical-mechanics/05.first-steps/textbook.en.md

@@ -53,10 +53,12 @@ starting with three initials in brackets that represent you :
 To **communicate my proposals**, either:
 * Directly on the *GitLab M3P2*:
 <details>
-<summary> More information </summary>
-Only for those who have an M3P2 account and have received the little introduction to Git:
-* Click "Améliorer ce cours" at the bottom of the page.
-* Login with your username / password
+<summary> 
+More information 
+</summary>
+Only for those who have an M3P2 account and have received the little introduction to Git:<br>
+\- Click "Améliorer ce cours" at the bottom of the page.<br>
+\- Login with your username / password
 </details>
 
 <br>