message: Doctest: Be resilient to `DRAKE_RAW` being defined in the environment.
diff: @@ -6,6 +6,9 @@ import os.path
  import sys
  import unittest
  +# Ignore DRAKE_RAW from the test environment as it will fail the docstring outputs.
  +os.environ.pop('DRAKE_RAW', None)
  +
  import drake
  import drake.cxx
  import drake.cxx.boost
  