Usually when we use `try` we actually mean `try!`, which is the same as
the safe navigation operator. However, there are a few cases where we
actually mean to execute a method if the object responds to that method.
In those cases using `try` would actually be OK, but in order to avoid
confusion as to whether we mean to check for `respond_to?` or we mean to
use safe navigation, I'm removing all usages of `try`.
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