Update...

Update 12.temporary_ins/20.magnetostatics-vacuum/20.causes-stationary-magnetic-field/20.overview/cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/20.causes-stationary-magnetic-field/20.overview/cheatsheet.fr.md

@@ -28,7 +28,7 @@ lessons:
        slug: biot-savard-magnetostatics-cylindrical-coordinates
        name: "OUTIL-MATH-3 : Coordonnées cylindriques et Biot et Savard"
        order: 
-     - 
+    - 
        slug: magnetostatics-wire-direct-ampere-3
        name: "PARALLÈLE-3 : Coordonnées cylindriques et Biot et Savard"
        order: 2