Merge pull request #9 from lukenoaa/master

minor edits

Author: lukenoaa

command-line/README.md

@@ -1,6 +1,6 @@
 # Command Line Tutorial
 
-This material is intended for a guided tutorial. If you are working on your own, check out Lessons 2 and 3 of the online course Python For Data Analysis (video lectures and markdown files):
+This material is intended for a guided tutorial. If you are working on your own, check out Lessons 2 and 3 of the online course Python for Data Analysis (video lectures and markdown files):
 
 * Lesson 2 (Part I of Command Line Tutorial): [Lesson 2 on YouTube](https://www.youtube.com/watch?v=rPj-hJDIKkE), [Lesson 2 on GitHub](https://github.com/cuttlefishh/python-for-data-analysis/blob/master/lessons/lesson02.md)
 * Lesson 3 (Part II of Command Line Tutorial): [Lesson 3 on YouTube](https://www.youtube.com/watch?v=UPfMM5oTVKk), [Lesson 3 on GitHub](https://github.com/cuttlefishh/python-for-data-analysis/blob/master/lessons/lesson03.md)