sinatra/sinatra — pull request #878 by alexeymuranov (2014-05-30 09:46:47+00:00)
Title: remove redundant/"protective" `to_sym`

Because:

1. `to_sym` is not called elsewhere on `environment`'s value (see 5 lines above),

2. the value in `environment` must have been obtained with `to_sym` (search for `set :environment`).