It actually is so that the line is in the output PostScript; and it is even
visible sometimes when you zoom the file (like, when you are zooming
continuously, the line is appearing and disappearing).
I guess it is a corner case of the clipping, highly dependent on the exact
settings, so let's be more relaxed and clip a bit less (as we already do for
right/bottom).
Hopefully some other functionality does not depend on this exact clip
setting ;-)
Change-Id: I7080ad3ff730408296f9e9dec7a0b74ac4afca7d
e705c37c44