Fix a docstring

[ablaom]

No description provided.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (43d9d6d) 88.04% compared to head (b8589be) 88.29%.
Report is 10 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #26      +/-   ##
==========================================
+ Coverage   88.04%   88.29%   +0.25%     
==========================================
  Files           7        8       +1     
  Lines         184      188       +4     
==========================================
+ Hits          162      166       +4     
  Misses         22       22              

Files	Coverage Δ
src/MLJText.jl	100.00% <ø> (ø)
src/bm25_transformer.jl	87.80% <100.00%> (ø)
src/count_transformer.jl	88.00% <100.00%> (ø)
src/docstring_helpers.jl	100.00% <100.00%> (ø)
src/tfidf_transformer.jl	87.50% <100.00%> (ø)

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