Merge branch 'master' into development

This involves the root-level README.md file.

Author: hollasch

README.md

@@ -31,7 +31,7 @@ $ git clone https://github.com/RayTracing/raytracing.github.io
 A local copy can also be obtained by pointing a git gui client to the link:
 ```
 https://github.com/RayTracing/raytracing.github.io
-``` 
+```
 
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