* vm_trace.c: [DOC] Fix TracePoint return values in examples
  Based on a patch by @sho-h [Fixes GH-373]
  https://github.com/ruby/ruby/pull/373


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42386 b2dd03c8-39d4-4d8f-98ff-823fe69b080e