Line mark is not centered with triangle mark when layout is circular

[etowahadams]

When layout is circular, the line marks are not centered with the triangle marks.

When layout is linear, they are centered:

Example to reproduce:

{
  "spacing": 0,
  "layout": "circular",
  "assembly": [["U00096.3", 4641652]],
  "style": {"enableSmoothPath": true},
  "views": [
    {
      "xDomain": {"chromosome": "U00096.3", "interval": [222000, 240000]},
      "alignment": "overlay",
      "data": {
        "url": "https://s3.amazonaws.com/gosling-lang.org/data/gff/E_coli_MG1655.gff3.gz",
        "indexUrl": "https://s3.amazonaws.com/gosling-lang.org/data/gff/E_coli_MG1655.gff3.gz.tbi",
        "type": "gff",
        "attributesToFields": [
          {"attribute": "gene_biotype", "defaultValue": "unknown"},
          {"attribute": "Name", "defaultValue": "unknown"}
        ]
      },
      "color": {
        "type": "nominal",
        "field": "gene_biotype",
        "domain": [
          "protein_coding",
          "tRNA",
          "rRNA",
          "ncRNA",
          "pseudogene",
          "unknown"
        ],
        "range": ["orange", "blue", "green", "red", "purple", "black"]
      },
      "tracks": [
        {
          "dataTransform": [
            {"type": "filter", "field": "type", "oneOf": ["gene"]},
            {"type": "filter", "field": "strand", "oneOf": ["+"]}
          ],
          "mark": "triangleRight",
          "x": {"field": "end", "type": "genomic", "axis": "top"},
          "size": {"value": 10}
        },
        {
          "dataTransform": [
            {"type": "filter", "field": "type", "oneOf": ["gene"]},
            {"type": "filter", "field": "strand", "oneOf": ["-"]}
          ],
          "mark": "triangleLeft",
          "x": {"field": "start", "type": "genomic"},
          "size": {"value": 10},
          "style": {"align": "right"}
        },
        {
          "dataTransform": [
            {"type": "filter", "field": "type", "oneOf": ["gene"]},
            {"type": "filter", "field": "strand", "oneOf": ["+"]}
          ],
          "mark": "rule",
          "x": {"field": "start", "type": "genomic"},
          "strokeWidth": {"value": 3},
          "xe": {"field": "end", "type": "genomic"},
          "style": {"linePattern": {"type": "triangleRight", "size": 5}}
        },
        {
          "dataTransform": [
            {"type": "filter", "field": "type", "oneOf": ["gene"]},
            {"type": "filter", "field": "strand", "oneOf": ["-"]}
          ],
          "mark": "rule",
          "x": {"field": "start", "type": "genomic"},
          "strokeWidth": {"value": 3},
          "xe": {"field": "end", "type": "genomic"},
          "style": {"linePattern": {"type": "triangleLeft", "size": 5}}
        }
      ],
      "row": {"field": "strand", "type": "nominal", "domain": ["+", "-"]},
      "visibility": [
        {
          "operation": "less-than",
          "measure": "width",
          "threshold": "|xe-x|",
          "transitionPadding": 10,
          "target": "mark"
        }
      ],
      "opacity": {"value": 0.8},
      "width": 800,
      "height": 80
    }
  ]
}