Merge pull request #328 from sarthak-v/patch-4

typo

ruby_programming/computer_science/lesson_common_data_structures_algorithms.md

@@ -42,7 +42,7 @@ Look through these now and then use them to test yourself after doing the assign
 </div>
 
 ### Additional Resources
-his section contains helpful links to other content. It isn't required, so consider it supplemental for if you need to dive deeper into something.
+This section contains helpful links to other content. It isn't required, so consider it supplemental for if you need to dive deeper into something.
 
 * [Khan Academy's great Algorithms Course](https://www.khanacademy.org/computing/computer-science/algorithms)
 * [Stanford's Coursera 4-Part Algorithm Course](https://www.coursera.org/specializations/algorithms)