- this documentation is mildly confusing when combined with hiccup's
`form-to` since hiccup forcibly transforms the method specified in
its convenience syntax: `(form-to [:delete "/my-url"] ... )` into an
upper-case string:
80e48352dd/src/hiccup/form.clj (L130)
- it's also common to get an upper-case string from elsewhere so it
seems best to wrap the hidden `_method` in `lower-case`.