diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index dd1bba455b2636a95c805f2c0642897e2244afdb..bb88a69a522df3ce2ef09657a8db65948ac7345a 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -7,7 +7,6 @@
     "# On the computation of $\\pi$\n",
     "\n",
     "## Asking the maths library\n",
-    "\n",
     "My computer tells me that $\\pi$ is *approximatively*"
    ]
   },
@@ -34,7 +33,6 @@
    "metadata": {},
    "source": [
     "## Buffon’s needle\n",
-    "\n",
     "Applying the method of [Buffon’s needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the **approximation**"
    ]
   },
@@ -68,7 +66,6 @@
    "metadata": {},
    "source": [
     "## Using a surface fraction argument\n",
-    "\n",
     "A method that is easier to understand and does not make use of the sin function is based on the\n",
     "fact that if $X ∼ U (0, 1)$ and $Y ∼ U (0, 1)$, then $P[ X^2 + Y^2 \\leq 1] = \\pi/4$ (see [\"Monte Carlo method\"\n",
     "on Wikipedia]()). The following code uses this approach:"