skip stroke outset of all teeny lines

Allow a small amount of slop when seeing
if the previous moveTo and subsequent lineTo
are the same.

R=robertphillips@google.com
BUG=593049
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1805913002

Review URL: https://codereview.chromium.org/1805913002
diff --git a/gm/arcto.cpp b/gm/arcto.cpp
index 2897e7a..cd26eef 100644
--- a/gm/arcto.cpp
+++ b/gm/arcto.cpp
@@ -187,3 +187,21 @@
     sk_fclose(file);
 #endif
 }
+
+DEF_SIMPLE_GM(bug593049, canvas, 300, 300) {
+    canvas->translate(111, 0);
+
+    SkPath p;
+    p.moveTo(-43.44464063610148f, 79.43535936389853f);
+    const SkScalar yOffset = 122.88f;
+    const SkScalar radius = 61.44f;
+    SkRect oval = SkRect::MakeXYWH(-radius, yOffset - radius, 2 * radius, 2 * radius);
+    p.arcTo(oval, 1.25f * 180, .5f * 180, false);
+
+    SkPaint paint;
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setStrokeCap(SkPaint::kRound_Cap);
+    paint.setStrokeWidth(15.36f);
+
+    canvas->drawPath(p, paint);
+}