Code review comment for lp:~inkscape+alexander/inkscape/offset-cubic-improvement

As far I find the problem is the 0 width segment in the closing point of the mountain

m 101.00553,6.8925054 5.26676,5.3490096 c 0.49943,0.510326 0.49249,1.499268 0.21305,1.783664 l -2.61505,-2.091842 -0.51429,3.09763 -2.18499,-1.153436 -3.498951,2.210752 -1.15839,-4.660317 -1.87979,3.252214 h -2.87368 c -1.171269,0 -1.309008,-1.486387 -0.24475,-2.55064 1.85897,-2.006622 3.99243,-4.0518896 5.15181,-5.2370346 1.16533,-1.191091 3.19573,-1.1574 4.338271,0 z