Use const_get to get klass without inject
#1384
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`Enumerable#inject` was used to get constant in `Rack::Handler.get`. But `Object#const_get` is available to get nested constant from Ruby version 2.0.0. And the required minimum ruby version of Rack is 2.2.2. It seems that `const_get` doesn't need `inject` anymore, and this change is for replacing it without `inject`.
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Enumerable#injectwas used to get constant inRack::Handler.get.But
Object#const_getis available to get nested constant from Ruby version 2.0.0.And the required minimum ruby version of Rack is 2.2.2.
It seems that
const_getdoesn't needinjectanymore,and this change is for replacing it without
inject.