Warning found:
in module Main
at tests/purs/warning/2140.purs:5:3 - 5:36 (line 5, column 3 - line 5, column 36)

  Type variable a was shadowed.

in type declaration for f
in type class declaration for Test

See https://github.com/purescript/documentation/blob/master/errors/ShadowedTypeVar.md for more information,
or to contribute content related to this warning.