Merge pull request #52 from ruby/revert-51-LICENSE

Revert "Clarify the license"

Author: sorah

COPYING

@@ -4,10 +4,10 @@ Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
+notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
 
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE