Wrong arrow head orientation for location less than 1.0
Using the predefined edge decorator ARROW with a location other than 1.0 results in an arrow head pointing to the wrong direction.
decorator { ARROW location (1.0) }
![arrow1](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
decorator { ARROW location (0.5) }
![arrow2](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)