# "divides" in ring of integers

It seems the method for "divides" is inherited to a ring_of_integers, but has undesirable behaviour:

```
f = CyclotomicField(3)
r = f.ring_of_integers()
gens = r.gens()
x = 1 + gens[1]
r(x).divides(r(gens[1]))
```

returns "True". Have I overlooked something here?

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