Update cheatsheet.fr.md

12.temporary_ins/10.electrostatics-vacuum/40.gauss-theorem-applications/25.cylindrical-charge-distributions/20.gauss-local/20.overview/cheatsheet.fr.md

@@ -436,7 +436,7 @@ E_{\rho}(\rho_M)=\dfrac{\rho_M\,\dens_0^{3D}}{2\epsilon_0}
 \end{array}\right\}
 \Longrightarrow`$
 **$`\mathbf{\overrightarrow{E}=\dfrac{\rho_M\,\dens^{3D}_0}{2\,\epsilon_0}\,\overrightarrow{e_{\rho}}}`$**
-<br------------>
+<b>
 
 <br>
 **$`\large\text{Pour  }\mathbf{\rho_M\gt R}`$** :