Update annex.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/instructions-for-levels/30.beyond/annex.fr.md

@@ -181,12 +181,14 @@ Sont proposées les catégories suivantes, mais à débattre :
 ! <summary>
 ! What is the optical system giving the image of the painting?
 ! </summary>
+!
 ! * The optical system is composed of two spherical refracting surfaces, centered on the same optical axis.
 ! </details>
 ! <details markdown=1>
 ! <summary>
 ! How do you characterize each of the single optical elements that make up this optical system, and their relative distances?
 ! </summary>
+!
 ! * The optical axis is oriented positively in the direction of light propagation (from the painting towards the lensball).
 !
 ! * The first spherical refracting surface $`DS1`$ encountered by the light has the follwing characteristics :<br>