Fix pretty printing of ParameterVector

src/Strat/params.jl

@@ -4,7 +4,6 @@ struct ParamMapping{T,name,layer}
     transform::T
     ParamMapping(transform::T, name::Symbol, layer::Symbol) where {T<:ParamTransform} = new{T,name,layer}(transform)
 end
-
 struct ParameterVector{T,TV,P,M} <: DenseArray{T,1}
     vals::TV # input/reparameterized param vector
     params::P # parameters grouped by layer and name
@@ -24,7 +23,8 @@ Base.getproperty(rv::ParameterVector, sym::Symbol) = getproperty(getfield(rv, :v
 Base.getindex(rv::ParameterVector, i) = getfield(rv, :vals)[i]
 Base.setproperty!(rv::ParameterVector, val, i) = setproperty!(getfield(rv, :vals), val, sym)
 Base.setindex!(rv::ParameterVector, val, i) = setindex!(getfield(rv, :vals), val, i)
-Base.show(io, ::MIME"text/plain", rv::ParameterVector) = println(io, getfield(rv, :vals))
+Base.show(io::IO, ::MIME"text/plain", rv::ParameterVector{T,<:Any,<:Any,Tuple{}}) where {T} = println(io, "$(length(rv))-element ParameterVector{T}:\n$(getfield(rv, :vals))")
+Base.show(io::IO, ::MIME"text/plain", rv::ParameterVector{T,<:Any,<:Any}) where {T} = println(io, "$(length(rv))-element ParameterVector{T} with $(length(mappings(rv))) mappings\n$(mappings(rv)):\n$(getfield(rv, :vals))")
 ComponentArrays.ComponentArray(rv::ParameterVector) = getfield(rv, :vals)
 
 _paramval(p::Param) = ustrip(p.val) # extracts value from Param type and strips units