[Checkins] [zopefoundation/RestrictedPython] a1772d: Add `slice()` to safe_builtins.

[GitHub]

  Branch: refs/heads/slice_as_safe_builtin
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: a1772d69c684c5477225fe3eddc9121d4e4e5fee
      https://github.com/zopefoundation/RestrictedPython/commit/a1772d69c684c5477225fe3eddc9121d4e4e5fee
  Author: Steffen Allner <sa at gocept.com>
  Date:   2017-05-03 (Wed, 03 May 2017)

  Changed paths:
    M src/RestrictedPython/Guards.py
    M tests/builtins/test_utilities.py
    A tests/test_Guards.py
    M tests/transformer/test_async.py

  Log Message:
  -----------
  Add `slice()` to safe_builtins.

RestrictedPython expects it to be present in RestrictedPython.transformer.RestrictingNodeTransformer.transform_slice().