Not right arc for absolute middle horizontal and vertical

[AndreaBarghigiani]

With a path defined as follows, we get the wrong values drawing the arcs.

const notPlayWellMiddleHorizontal = [
  ["h", 30],
  ["v", 10],
  ["H", 150],
  ["v", 5],
  ["H", 75],
  ["v", 15],
  ["H", "close"],
  ["v", 70],
  ["H", 250],
  ["v", -5],
  ["H", 375],
  ["v", 5],
  ["H", "start"],
  ["v", -30],
  ["H", -60],
  ["v", -35],
  ["H", "start"],
  ["v", -35],
];

As you can see from the image below the issue is present for the shape at the bottom and for the first two arcs that get's created while closing the shape.

TODO:
Improve checks for the createArc() function.