Fix missing args in docstring of metadata_model

[rikhuijzer]

No description provided.

[ablaom]

Removing docstring from the document string (sic) was intentional, as implementers should just give a doc-string in the usual way now. The docstring trait remains but is now computed rather than overloaded. In JuliaAI/MLJ.jl#913 we are working to remove overloadings from implementations.

It would be appropriate to have metadata_model throw a depwarn if this kwarg is specified and put in the next patch.

Good catch with the human_name.

[codecov-commenter]

Codecov Report

Merging #150 (9c1bf7c) into dev (536dd72) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #150   +/-   ##
=======================================
  Coverage   88.95%   88.95%           
=======================================
  Files           8        8           
  Lines         326      326           
=======================================
  Hits          290      290           
  Misses         36       36           

Impacted Files	Coverage Δ
src/metadata_utils.jl	100.00% <ø> (ø)

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[ablaom]

Thanks for that.