Cleanup EOL whitespace

Author: sferik

CONTRIBUTING.md

@@ -10,6 +10,6 @@ Here are some reasons why a pull request may not be merged:
 6. It breaks the tests on a supported platform.
 7. It doesn’t merge cleanly (requiring Git rebasing and conflict resolution).
 
-If you would like to help in this process, you can start by evaluating open pull requests against the criteria above. For example, if a pull request does not include specs for new functionality, you can add a comment like: “If you would like this feature to be added to Thor, please add specs to ensure that it does not break in the future.” This will help move a pull request closer to being merged.  
+If you would like to help in this process, you can start by evaluating open pull requests against the criteria above. For example, if a pull request does not include specs for new functionality, you can add a comment like: “If you would like this feature to be added to Thor, please add specs to ensure that it does not break in the future.” This will help move a pull request closer to being merged.
 
-Include this emoji in the top of your ticket to signal to us that you read this file: 🌈
+Include this emoji in the top of your ticket to signal to us that you read this file: 🌈