After converting a single line, there is an extra newline at the end?

[georgbachmann]

I am playing around with bypass and came to a little problem.
When I convert for example the string This is a test it will result in an attributed string, that is This is a test\n.

Is this normal behavior? I tried with default BPDisplaySettings as well as with tweaked parameters... No effect :(

Am I doing something wrong or is this a bug?