No `Formula` struct

[ajinkya-k]

the documentation for @formula macro refers to the Formula struct, but as far as I can tell there is no such struct defined. See here:

StatsModels.jl/src/formula.jl

Line 26 in e029ef4

Capture and parse a formula expression as a `Formula` struct.

Was this supposed to be changed to FormulaTerm at some point of time? Because currently the @formula macro returns a FormulaTerm struct. I am happy to make changes to the docstrings for this

[kleinschmidt]

Yes that's out of date, a PR would be very welcome!

[ajinkya-k]

Yes that's out of date, a PR would be very welcome!

Done!

[ajinkya-k]

@kleinschmidt Can you check if the changes are correct?