Real x0 = robust_relative_extent (lgr, commonx, X_AXIS)[LEFT];
Real x1 = robust_relative_extent (rgr, commonx, X_AXIS)[RIGHT];
bool follow_beam = par_beam
- && ((get_grob_direction (par_beam) == dir)
- || to_boolean (par_beam->get_property ("knee")));
+ && get_grob_direction (par_beam) == dir
+ && ! to_boolean (par_beam->get_property ("knee"));
vector<Offset> points;
if (columns.size ()