- Fixed "#7845 - Arc Path Renders incorrectly" as described in the work item -...

- Fixed "#7845 - Arc Path Renders incorrectly" as described in the work item - W3C example now renders   correctly.
- Ensured that a divide by zero exception could not occur during rendering of stroke dash arrays.

Basic Shapes/SvgGraphicsElement.cs

@@ -110,7 +110,7 @@ namespace Svg
                                 pen.DashPattern = this.StrokeDashArray.ConvertAll<float>(delegate(SvgUnit unit)
                                 {
                                     // divide by stroke width - GDI behaviour that I don't quite understand yet.
-                                    return unit.Value / strokeWidth;
+                                    return unit.Value / ((strokeWidth <= 0) ? 1 : strokeWidth);
                                 }).ToArray();
                             }
 

Paths/SvgArcSegment.cs

@@ -99,7 +99,7 @@ namespace Svg.Pathing
             }
             else
             {
-                root = (this.Size == SvgArcSize.Large && this.Sweep == SvgArcSweep.Positive ? -1.0 : 1.0) * Math.Sqrt(numerator / (this.RadiusX * this.RadiusX * y1dash * y1dash + this.RadiusY * this.RadiusY * x1dash * x1dash));
+                root = ((this.Size == SvgArcSize.Large && this.Sweep == SvgArcSweep.Positive) || (this.Size == SvgArcSize.Small && this.Sweep == SvgArcSweep.Negative) ? -1.0 : 1.0) * Math.Sqrt(numerator / (this.RadiusX * this.RadiusX * y1dash * y1dash + this.RadiusY * this.RadiusY * x1dash * x1dash));
             }
 
             double cxdash = root * rx * y1dash / ry;

Paths/SvgPathBuilder.cs

@@ -57,8 +57,8 @@ namespace Svg
 
                             for (var i = 0; i < coords.Count; i += 7)
                             {
-                                size = (coords[i + 3] == 1.0f) ? SvgArcSize.Large : SvgArcSize.Small;
-                                sweep = (coords[i + 4] == 1.0f) ? SvgArcSweep.Positive : SvgArcSweep.Negative;
+                                size = (coords[i + 3] != 0.0f) ? SvgArcSize.Large : SvgArcSize.Small;
+                                sweep = (coords[i + 4] != 0.0f) ? SvgArcSweep.Positive : SvgArcSweep.Negative;
 
                                 // A|a rx ry x-axis-rotation large-arc-flag sweep-flag x y
                                 segments.Add(new SvgArcSegment(segments.Last.End, coords[i], coords[i + 1], coords[i + 2],
@@ -235,7 +235,7 @@ namespace Svg
         private static IEnumerable<float> ParseCoordinates(string coords)
         {
             // TODO: Handle "1-1" (new PointF(1, -1);
-            var parts = coords.Remove(0, 1).Replace("-", " -").Split(new[] { ',', ' '},
+            var parts = coords.Remove(0, 1).Replace("-", " -").Split(new[] { ',', ' ' },
                 StringSplitOptions.RemoveEmptyEntries);
 
             for (var i = 0; i < parts.Length; i++)