Update cheatsheet.fr.md

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

@@ -896,9 +896,10 @@ $`\begin{align}
 \\
 &=(\partial_b\,v^a)\;\mathbf{e_a} + v^a\,(\partial_b\;\mathbf{e_a})\\
 \\
-&=(\partial_b\,v^a)\,\mathbf{e_a})+\underbrace{v^a\,\Gamma_{ab}^{\;c}\,\mathbf{e_c}}_{\color{brown}{\text{a et c muets}\\ \Rightarrow\text{interchangeables}}}\\
+&=(\partial_b\,v^a)\,\mathbf{e_a}+\underbrace{v^a\,\Gamma_{ab}^{\;c}\,\mathbf{e_c}}_{\color{brown}{
+\begin{array}{c}\text{a et c muets}\\ \Rightarrow \\ \text{interchangeables}\end{array}}}\\
 \\
-&\Large{\color{blue}{=(\partial_b\,v^a) + v^a\,\Gamma_{cb}^{\;a})\,\mathbf{e_a}}}
+&\Large{\color{blue}{=\big(\partial_b\,v^a + v^a\,\Gamma_{cb}^{\;a}\big)\,\mathbf{e_a}}}
 \end{align}`$