Update cheatsheet.fr.md

12.temporary_ins/07.geometry-coordinates-prop2/40.n4/20.overview/cheatsheet.fr.md

@@ -1021,7 +1021,7 @@ _{\color{blue}{\begin{array}{c}\text{a, b et c muets} \,\Longrightarrow \\ \text
 \\
 &=\dfrac{dv^a}{d\lambda}\,\mathbf{e_a}+\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c\,\mathbf{e_a}\\
 \\
-&=\Large{\underbrace{\left(\color{brown}{\dfrac{dv^a}{d\lambda}\,+\,\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c}\right)
+&\color{brown}{=\Large{\underbrace{\Big(\dfrac{dv^a}{d\lambda}\,+\,\Gamma_{bc}^{\;a}\,\dfrac{dx^b}{d\lambda}\,v^c\Big)}
 _{\normalsize{\color{blue}{=\,\dfrac{Dv^a}{D\lambda}}}\,\mathbf{e_a}}}}
 \end{align}`$