Documentation/COPYING: Remove trailing whitespace

Change-Id: I796159f055a19537247652ecb3e86a03f3104a3c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/25835
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

Documentation/COPYING

@@ -54,7 +54,7 @@ exhaustive, and do not form part of our licenses.
      such as asking that all changes be marked or described.
      Although not required by our licenses, you are encouraged to
      respect those requests where reasonable. More_considerations
-     for the public: 
+     for the public:
 	wiki.creativecommons.org/Considerations_for_licensees
 
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