This word appears often in class descriptions and is not consistently spelled. Update comments and some function names to use the correct spelling consistently. Facilitates searching the codebase.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/155944
Approved by: https://github.com/Skylion007
Implemented by extending `collections.abc.MutableSet` and backing it with a dictionary, which is ordered. From collections.abc.MutableSet:
```
A mutable set is a finite, iterable container.
This class provides concrete generic implementations of all
methods except for __contains__, __iter__, __len__,
add(), and discard().
```
In addition to implementing those methods I also had to define some methods of python's set which were not implemented in MutableSet.
I reused the test from my python's lib. There were a few instances of tests that didnt pass because edge case behavior that is not necessary to reimplement
- support self-referencing repr
- erroring when an member's `__eq__` function would modify the set itself
- MutableSet supports Iterables as inputs, but not sequences (pretty rare..)
- Some specifics of exact equivalent type errors being thrown
- [The protocol for automatic conversion to immutable](https://docs.python.org/2/library/sets.html#protocol-for-automatic-conversion-to-immutable)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/130003
Approved by: https://github.com/aorenste
