Update textbook.en.md

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

@@ -29,9 +29,8 @@ They can be changed easily, they are not the main structure.
 
 At this first level, think: <br>
  * What knowledge on this topic is useful in everyday life.
- * Start from the actions and perceptions of the daily life, using the right vocabulary (example: the arm
-lever, the couple to remove a bolt with a jack, the figure skater, ...).
-* What amazes us? (example, gyroscope, spinning top). 
+ * Start from the actions and perceptions of the daily life, using the right vocabulary (example: the arm lever, the couple to remove a bolt with a jack, the figure skater, ...).
+ * What amazes us? (example, gyroscope, spinning top). 
 
 At this first level, chapter titles should be everyday words.
 
@@ -55,7 +54,7 @@ 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: <br>
+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
 </details>