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+Permission is granted to copy, distribute and/or modify the
+documentation for GNU LilyPond under the terms of the GNU Free
+Documentation License as published by the Free Software Foundation,
+either version 1.3, or (at your option) any later version; with no
+Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.
+
+A copy of the license is contained in the file COPYING.FDL.
+
+The following exceptions apply:
+
+ * It does not apply to input files (contained in the
+ directory tree Documentation/snippets/); these are in
+ the public domain.
+
+ * It does not apply to any manual which explicitly states
+ another license.