Merge branch 'event_rpcgen.py-cleanup'

Merge branch 'event_rpcgen.py-cleanup'

* event_rpcgen.py-cleanup:
  event_rpcgen.py: fix arguments-differ
  event_rpcgen.py: fix attribute-defined-outside-init
  event_rpcgen: suppress some warnings to make pylint clean
  Don't accumulate arguments in `Entry.GetTranslation`
  Fix improper string concatenations in lists
  Fix warnings regarding unused variables
  Don't override the `type` built-in
  Call `super` to call methods from the parent class
  Address `no-self-use` issues reported by pylint
  Run the code through the black formatter
  Reformat strings to template
  Add `argparse` support
  Precompile regular expressions
  Use bools instead of ints values where possible
  Rename all global variables to match the PEP8 spec
  Handle file pointers with context suite patterns
  Iterate over `tokens` with a for instead of while
  Fix indentation for `RpcGenError`
  Don't override `file` built-in
  Resolve variable name issues per PEP8
  Sort imports per PEP8