Update copyright to 2015
diff --git a/src/ruby/spec/call_spec.rb b/src/ruby/spec/call_spec.rb
index 8bb5043..2a47eac 100644
--- a/src/ruby/spec/call_spec.rb
+++ b/src/ruby/spec/call_spec.rb
@@ -1,4 +1,4 @@
-# Copyright 2014, Google Inc.
+# Copyright 2015, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -160,4 +160,4 @@
   def deadline
     Time.now + 2  # in 2 seconds; arbitrary
   end
-end
+end
\ No newline at end of file