message: use correct variable in direct movement strategy
diff: @@ -488,7 +488,7 @@ class Robot(object):
  instrument._move(**coord)
  elif strategy == 'direct':
  - position = {'x':coordinates[0], 'y': coordinates[1], 'z': coordinates[2]}
  + position = {'x': target[0], 'y': target[1], 'z': target[2]}
  instrument._move(**position)
  else:
  raise RuntimeError(
  