fix a docstring

Author: ablaom

docs/src/reference.md

@@ -116,7 +116,7 @@ understood to have a valid implementation of the LearnAPI.jl interface.
 
 #### Example
 
-Any instance of `GradientRidgeRegressor` defined below is a valid learner.
+Below is an example of a learner type with a valid constructor:
 
 ```julia
 struct GradientRidgeRegressor{T<:Real}

src/target_weights_features.jl

@@ -72,7 +72,7 @@ implemented, as in the following sample workflow:
 ```julia
 model = fit(learner, data)
 X = LearnAPI.features(learner, data)
-ŷ = predict(learner, kind_of_proxy, X) # eg, `kind_of_proxy = Point()`
+ŷ = predict(model, kind_of_proxy, X) # eg, `kind_of_proxy = Point()`
 ```
 
 For supervised models (i.e., where `:(LearnAPI.target) in LearnAPI.functions(learner)`)