Autoformatting the search.py
Autoformatting the search.py

Summary:
Autoformat the `search.py` in fairseq

(Note: this ignores all push blocking failures!)

Differential Revision: D20038581

fbshipit-source-id: f2256e6c56948bcee8c029013c23acfd0419252b

pytorch/fairseq,pytorch/fairseq,pytorch/fairseq