[Rd] binary form of is() contradicts its unary form

[Iñaki Úcar]

2017-11-30 3:14 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>:
> My understanding is that there is no inconsistency. `is` does what it
> claims, from the documentation:
>
> ‘is’: With two arguments, tests whether ‘object’ can be treated as
>           from ‘class2’.
>
>           With one argument, returns all the super-classes of this
>           object's class.

Note that this is not in the documentation since a year ago.

Iñaki