fix build (EbookFoundation#4849)

Author: eshellman

free-programming-cheatsheets.md

@@ -51,10 +51,12 @@
 
 * [Handy Cheat Sheet for Kubernetes Beginners](https://kubernetes.io/docs/reference/kubectl/cheatsheet/) - Kubernetes Documentation: kubectl Cheat Sheet
 
+
 ### Language Translations
 
 * [Swift and C# Quick Reference - Language Equivalents and Code Examples](http://www.globalnerdy.com/wordpress/wp-content/uploads/2015/03/SwiftCSharpPoster.pdf) - Globalnerdy (PDF)
 
+
 ### Markdown
 
 * [Markdown Here](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet) - Adam Pritchard