Moritz v. Looz issues

Results 4 issues of


                                            Moritz v. Looz

**Describe the bug** Documentation for the constant_argument meta problem is outdated and still references the boolean flag vector

bug

Adding an UDA wrapping https://github.com/fmfn/BayesianOptimization Work in Progress

https://github.com/esa/pykep/blob/b410363653623730b577de257c04b0e0289f2014/pykep/trajopt/gym/_solar_orbiter.py#L118

bug

When copying the CMake commands for installation by source, a surplus space made the commands invalid. This PR removes them.