docs: fix signatures

Author: MilesCranmer

docs/src/api.md

@@ -60,7 +60,7 @@ When using these node constructors, types will automatically be promoted.
 You can convert the type of a node using `convert`:
 
 ```@docs
-convert(::Type{AbstractExpressionNode{T1}}, tree::AbstractExpressionNode{T2}) where {T1, T2}
+convert(::Type{N1}, tree::N2) where {T1,T2,D1,D2,N1<:AbstractExpressionNode{T1,D1},N2<:AbstractExpressionNode{T2,D2}}
 ```
 
 You can set a `tree` (in-place) with `set_node!`:

docs/src/utils.md

@@ -15,7 +15,6 @@ mapreduce(f::F, op::G, tree::AbstractNode; return_type, f_on_shared, break_shari
 any(f::F, tree::AbstractNode) where {F<:Function}
 all(f::F, tree::AbstractNode) where {F<:Function}
 map(f::F, tree::AbstractNode, result_type::Type{RT}=Nothing; break_sharing::Val=Val(false)) where {F<:Function,RT}
-convert(::Type{<:AbstractExpressionNode{T1}}, n::AbstractExpressionNode{T2}) where {T1,T2}
 hash(tree::AbstractExpressionNode{T}, h::UInt; break_sharing::Val=Val(false)) where {T}
 ```