typos python_fm_1.ipynb and python_fm_2.ipynb

Author: semacu

python_fm_1.ipynb

@@ -24,7 +24,7 @@
     "- [Loops](#Loops)\n",
     "- [Files](#Files)\n",
     "- [Getting help](#Getting-help)\n",
-    "- [Exercises 1.1](#Exercises-1.1)"
+    "- [Exercise 1.1](#Exercise-1.1)"
    ]
   },
   {
@@ -186,9 +186,9 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Dictionaries\n",
+    "## Dictionnaries\n",
     "\n",
-    "A dictionary is an unordered collection of key-value pairs where keys must be unique."
+    "A dictionnary is an unordered collection of key-value pairs where keys must be unique."
    ]
   },
   {
@@ -510,7 +510,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Exercises 1.1\n",
+    "## Exercise 1.1\n",
     "\n",
     "We are going to look at a [Gapminder](https://www.gapminder.org/) dataset, made famous by Hans Rosling from the Ted presentation [‘The best stats you’ve ever seen’](http://www.ted.com/talks/hans_rosling_shows_the_best_stats_you_ve_ever_seen).\n",
     "\n",