Fix MLJ metadata declarations so that new docstrings get written to the MLJ model registry

[ablaom]

Currently:

julia> using MLJModels

julia> doc("EvoTreeClassifier")
  Multi-classification with softmax and cross-entropy loss.

This is also an issue for EvoLinear.jl and the fix required is likely the same.

Follow up required:

• Update the MLJ model registry

[codecov-commenter]

Codecov Report

Base: 49.86% // Head: 49.86% // No change to project coverage 👍

Coverage data is based on head (fd45084) compared to base (689a01e).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #180   +/-   ##
=======================================
  Coverage   49.86%   49.86%           
=======================================
  Files          17       17           
  Lines        1500     1500           
=======================================
  Hits          748      748           
  Misses        752      752           

Impacted Files	Coverage Δ
src/MLJ.jl	87.23% <ø> (ø)

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[jeremiedb]

Sorry about the naive question, but I'm not sure to understand what's the issue with the example provided:

julia> doc("EvoTreeClassifier")
  Multi-classification with softmax and cross-entropy loss.

What's the expected outcome?

[ablaom]

You should get the full doc-string: the same as if you do "using EvoTrees.jl; @doc EvoTreeClassifier".

The MLJ model trait docstring (alias descs) used to be for a short summary string, which was not that useful, in retrospect. Now it is not to be overloaded but instead falls back to full docstring. More at JuliaAI/MLJ.jl#898 .

[jeremiedb]

I guess we can remove the short descriptions in lines 97-101 as well?

[ablaom]

Good catch. Done.