Improve wording in list comprehensions example

Author: treyhunner

part-4.ipynb

@@ -110,14 +110,14 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Note how our list comprehension is written within the brackets: The for-loop statement is written at the end whereas the action inside of the for-loop is written first: n * n"
+      "Note how our list comprehension is written within the brackets: The list we're looping over (my_favorite_numbers) is written at the end whereas the action inside of the for-loop is written first: n * n"
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Let's revisit a problem we've already solved in Danny's lecture on list:\n",
+      "Let's revisit a problem we've already solved in Danny's lecture on lists:\n",
       "\n",
       "Pick every name from a list that begins with a vowel.\n",
       "\n",