Merge pull request #1071 from SciML/ChrisRackauckas-patch-2

Add reference to optimizationsolution in the solve docs

Author: ChrisRackauckas

src/solve.jl

@@ -43,9 +43,11 @@ end
 
 """
 ```julia
-solve(prob::OptimizationProblem, alg::AbstractOptimizationAlgorithm, args...; kwargs...)
+solve(prob::OptimizationProblem, alg::AbstractOptimizationAlgorithm, args...; kwargs...)::OptimizationSolution
 ```
 
+For information about the returned solution object, refer to the documentation for [OptimizationSolution](@ref)
+
 ## Keyword Arguments
 
 The arguments to `solve` are common across all of the optimizers.