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@@ -40,5 +40,6 @@ to see who has contributed to it.
 #### What Is Copyleft?
 
 Here are a few sources to read generally what copyleft is:
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   * [Richard M. Stallman's essay on copyleft at gnu.org](https://www.gnu.org/copyleft/)
   * [The Wikipedia entry on Copyleft](http://en.wikipedia.org/wiki/Copyleft)