diff --git a/module2/exo1/toy_document_en.Rmd b/module2/exo1/toy_document_en.Rmd
index 72b2b96a0a239a912de2e28cc6aedd33c31804ac..169a1d8c4576e7d0ddf91271a63125197901c3df 100644
--- a/module2/exo1/toy_document_en.Rmd
+++ b/module2/exo1/toy_document_en.Rmd
@@ -17,7 +17,6 @@ pi
 ```
 
 ## Buffon's needle
-
 Applying the method of [Buffon's needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the __approximation__
 
 ```{r}
@@ -29,7 +28,6 @@ theta = pi/2*runif(N)
 ```
 
 ## Using a surface fraction argument
-
 A method that is easier to understand and does not make use of the $\sin$ function is based on the fact that if $X\sim U(0,1)$ and $Y\sim U(0,1)$, then $P[X^2+Y^2\leq 1] = \pi/4$ (see ["Monte Carlo method" on Wikipedia](https://en.wikipedia.org/wiki/Monte_Carlo_method)). The following code uses this approach:
 
 ```{r}