fix two typos

src/combinators/affine.jl

@@ -351,4 +351,4 @@ std(d::Affine{(:μ,)}) = std(parent(d))
 std(d::Affine{(:σ,)}) = d.σ * std(parent(d))
 std(d::Affine{(:λ,)}) = d.λ \ std(parent(d))
 std(d::Affine{(:μ, :σ)}) = d.σ * std(parent(d))
-std(f::Affine{(:μ, :λ)}) = d.λ \ std(parent(d))
+std(d::Affine{(:μ, :λ)}) = d.λ \ std(parent(d))

src/combinators/convolve.jl

@@ -4,7 +4,7 @@ struct Convolution{M,N} <: AbstractMeasure
 end
 
 """
-If μ, ν are subtypes of `AbstractMeasure` or satisfy the Measure interface, r
+If μ, ν are subtypes of `AbstractMeasure` or satisfy the Measure interface,
 then `convolve(μ, ν)` is a measure, called the convolution of μ and ν.
 """
 convolve(μ, ν) = Convolution(μ, ν)