Add self to Python printer reserved words (#15318)
Summary:
This adds `self` to the list of reserved words and also sorts the lines and prevents the tracer from naming values 'self' (which happens in torch/tensor.py)
Fixes #15240
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15318
Differential Revision: D13498974
Pulled By: driazati
fbshipit-source-id: 488efb661476cdcdb8ecb9cb48942f02e3c1e611
