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cca4c51ca4
`PyUnicode_DecodeLatin1` requires you to pass in the `error` parameter. The code as it is in the docs didn't compile. There is a reference leak in the example code. `PyUnicode_DecodeLatin1` returns a new reference. Calling `py::str(PyObject*)` calls `PyObject_Str`, which also returns a new reference. That reference is managed by the `py::str` constructor (which correctly steals the reference, using the `stolen_t` constructor), but the original reference returned by `PyUnicode_DecodeLatin1` is never decref'd: it never makes it into an `object`, and it's never manually decremented. This fixes both of those issues. The code compiles, and I viewed the sphinx docs locally.
