fix: remove trailing space to appease linter

foundations/javascript_basics/variables_and_operators.md

@@ -15,7 +15,7 @@ This section contains a general overview of topics that you will learn in this l
 
 ### How to run JavaScript code
 
-All JavaScript we will be writing in the majority of the Foundations course will be run via the browser. Later lessons in Foundations and the NodeJS path will show you how to run JavaScript outside of the browser environment. 
+All JavaScript we will be writing in the majority of the Foundations course will be run via the browser. Later lessons in Foundations and the NodeJS path will show you how to run JavaScript outside of the browser environment.
 
 Outside of these lessons, for now you should always default to running your JavaScript in the browser unless otherwise specified, otherwise you may run into unexpected errors.