Tests fail on Julia 1.13: keyword-only anonymous function in test/problems/goddard.jl #996

The tests fail on Julia 1.13 with a syntax error in test/problems/goddard.jl, line 82:

return function (; hamiltonian_type::Symbol=:total)

LoadError: syntax: invalid assignment location "hamiltonian_type::Symbol = :total" around test/problems/goddard.jl:82

An anonymous function whose arguments are keywords only is rejected by the 1.13 parser. The error hits every test file that includes the Goddard problem: suite/builders/test_options_forwarding.jl, suite/indirect/test_shooting_sweep.jl, suite/problems/test_forms_equivalent.jl, suite/problems/test_hamiltonian_type.jl.

Seen in the CI of main (the 1.13 jobs fail, 1.10 passes) and in the breakage suite of CTBase, on main and on v2.2.1-beta: https://github.com/control-toolbox/CTBase.jl/actions/runs/39232998112. Since version: 1 now resolves to 1.13, every job on 1 fails too.

Fix: give the closure a name, which the parser accepts on every version, e.g.

shoot(; hamiltonian_type::Symbol=:total) = begin ... end
return shoot

or the arrow form (; hamiltonian_type::Symbol=:total) -> .... Worth a search for the same pattern elsewhere in test/ and src/.

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