diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index e18564ac523948749873334c8c16f23a7689cb9a..9be2cb81452659e0f76452637742f11af0613ac1 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -4,14 +4,14 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# On the computation of $\\pi$ "
+    "# On the computation of $\\pi$"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Asking the maths library \n",
+    "## Asking the maths library\n",
     "\n",
     "\n",
     "My computer tells me that $\\pi$ is *approximatively*"