Update cheatsheet.fr.md

12.temporary_ins/90.electromagnetism-in-vacuum/10.maxwell-equations/20.overview/cheatsheet.fr.md

@@ -684,18 +684,14 @@ $`\mathbf{div\,\big(\overrightarrow{U}\land\overrightarrow{V}\big)=
   _{\color{blue}{=-\frac{\partial \vec{B}}{\partial t}}}\big)\,
   -\,\overrightarrow{E}\cdot\big(\underbrace{\overrightarrow{rot}\,\overrightarrow{B}}_{\color{blue}{=\mu_0\,\vec{j}+\mu_0\epsilon_0\frac{\partial \vec{E}}{\partial t}
   }}\big)`$   
-  <br><br>
-  @@@@@@@@@@@@@
-  <br><br>
+  <br>
   $`
   div\,\big(\overrightarrow{E}\land\overrightarrow{B}\big)
   =-\,\mu_0\,\vec{j}\cdot\overrightarrow{E}\,-\,\mu_0\,\epsilon_0\dfrac{\partial \vec{E}}{\partial t}\cdot\overrightarrow{E}
   \,
   -\,\overrightarrow{B}\cdot \dfrac{\partial \vec{B}}{\partial t}\big)
   `$   
-  <br><br>
-  @@@@@@@@@@@@@
-  <br><br>
+  <br>
   $`\color{blue}{\scriptsize{
   \text{Souviens-toi que } \vec{u}\dfrac{\partial \vec{u}}{\partial t}=\dfrac{1}{2}\,\dfrac{\partial (\vec{u}\cdot\vec{u})}{\partial t}=\dfrac{1}{2}\,\dfrac{\partial u^2}{\partial t}}}`$   
   <br>