Fix code style of samples in fv_converter.
Merge branch 'feature/codestyle' of github.com:jubatus/jubatus into feature/codestyle
Merge branch 'feature/codestyle' of github.com:jubatus/jubatus into feature/codestyle
Merge branch 'feature/codestyle' of github.com:jubatus/jubatus into feature/codestyle
Merge branch 'feature/codestyle' of github.com:jubatus/jubatus into feature/codestyle
stop using PairVectorEquals in mecab splitter test