Update cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/40.ampere-theorem-applications/30.cylindrical-current-distributions/10.rectilinear-current/20.ampere-local/20.overview/cheatsheet.fr.md

@@ -217,11 +217,11 @@ $`\begin{align}
 \mathbf{\overrightarrow{rot}\,\overrightarrow{B}}
 &\boldsymbol{\mathbf{=\left(\dfrac{1}{\rho}\,\dfrac{\partial B_z}{\partial\varphi}\;-\;\dfrac{\partial B_{\varphi}}{\partial z}\right)\,\overrightarrow{e_{\rho}}}}\\
 \\
-&\boldsymbol{\quad +\left(\dfrac{\partial B_{\rho}}{\partial z}\;-\;\dfrac{\partial B_z}{\partial \rho}\right)\,\overrightarrow{e_{\varphi}}}\\
+&\boldsymbol{\mathbf{\quad +\left(\dfrac{\partial B_{\rho}}{\partial z}\;-\;\dfrac{\partial B_z}{\partial \rho}\right)\,\overrightarrow{e_{\varphi}}}}\\
 \\
-&\mathbf{\quad +
+&\boldsymbol{\mathbf{\quad +
 \dfrac{1}{\rho}\,\left(\dfrac{\partial (\,\rho\,B_{\varphi})}{\partial \rho}\;-\;\dfrac{\partial B_{\rho}}{\partial \varphi}\right)
-\,\overrightarrow{e_z}}
+\,\overrightarrow{e_z}}}
 \end{align}`$
 
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