Fix typo in docstring

src/solve_model.jl

@@ -48,7 +48,7 @@ end
 """
     @global_model_constructor BuildingBlockType
 
-Add a onstructor the [`BuildingBlock`](@ref) subtype that fetches the global JuMP model (set by [`set_model`](@ref)) and assigns it to the first argument.
+Add a constructor to the [`BuildingBlock`](@ref) subtype that fetches the global JuMP model (set by [`set_model`](@ref)) and assigns it to the first argument.
 ```
 BuildingBlockType(args...; kwargs...) = BuildingBlockType(global_model::JuMP.Model, args...; kwargs...)
 ```