Fix typo in changes.md

Author: chao2zhang

docs/api-guide/changes.md.html

@@ -31,7 +31,7 @@
 * Bytecode verification: Instead of warning about 3rd party lint checks
   being obsolete because they were not compiled against the latest Lint
   API, lint now run its own bytecode verification against the lint jar
-  and will silently accept accept older (and newer!) lint checks if
+  and will silently accept older (and newer!) lint checks if
   they do not reference APIs that are not available.
 
 * Android Lint checks can now always access the resource repository for