Make sure we return modified arguments from _add_args_from_env
Make sure we return modified arguments from _add_args_from_env

Summary: .

Reviewed By: jtorkkola

shipit-source-id: 95be24e594

Addepar/buck,zpao/buck,nguyentruongtho/buck,zpao/buck,Addepar/buck,kageiit/buck,JoelMarcey/buck,facebook/buck,JoelMarcey/buck,JoelMarcey/buck,facebook/buck,facebook/buck,facebook/buck,JoelMarcey/buck,kageiit/buck,zpao/buck,facebook/buck,Addepar/buck,Addepar/buck,nguyentruongtho/buck,kageiit/buck,Addepar/buck,Addepar/buck,JoelMarcey/buck,JoelMarcey/buck,JoelMarcey/buck,Addepar/buck,Addepar/buck,kageiit/buck,kageiit/buck,nguyentruongtho/buck,nguyentruongtho/buck,Addepar/buck,JoelMarcey/buck,zpao/buck,JoelMarcey/buck,Addepar/buck,nguyentruongtho/buck,kageiit/buck,Addepar/buck,Addepar/buck,nguyentruongtho/buck,JoelMarcey/buck,zpao/buck,JoelMarcey/buck,zpao/buck,Addepar/buck,facebook/buck,nguyentruongtho/buck,JoelMarcey/buck,kageiit/buck,facebook/buck,zpao/buck,JoelMarcey/buck