Update cheatsheet.fr.md

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

@@ -202,8 +202,8 @@ $`\iint_S \overrightarrow{rot} \,\overrightarrow{B}\cdot\overrightarrow{dS} = \m
 \iint_S \overrightarrow{rot} \,\overrightarrow{B}\cdot\overrightarrow{dS} = \mu_0\iint_S \overrightarrow{j}\cdot\overrightarrow{dS} +
  \mu_0 \epsilon_0\dfrac{d}{dt}\iint_S\overrightarrow{E}\cdot\overrightarrow{dS} \\
 \iint_{S} \;\overrightarrow{rot}\;\overrightarrow{B} \cdot dS = \oint_{\,\Gamma\leftrightarrow S} \overrightarrow{B}\cdot\overrightarrow{dl}
-\end{array}\right\}
-\Longrightarrow`$
+\end{array}\right\}`$
+$`\Longrightarrow`$
 **$`\begin{array}{l}
     \\
  \mathbf{\displaystyle\;\,\oint_{\,\Gamma\leftrightarrow S} \overrightarrow{B}\cdot\overrightarrow{dl}=