[Dev] Test retcode of MINPACK.fsolve in Goddard #12
Description
test sol.converged after sol = fsolve. check: https://people.sc.fsu.edu/~jburkardt/f_src/fsolve/fsolve.f90
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test sol.converged after sol = fsolve. check: https://people.sc.fsu.edu/~jburkardt/f_src/fsolve/fsolve.f90