MapCode returns incorrect edit for full document

[ryzngard]

Given the following json message for the mapcode call from the client (not the replaced URI since that will be project/machine dependent).

{
  "traceparent": "00-a00a2f15e22cad4bb5fadc1101371c5f-ab3a54102dc2954d-01",
  "jsonrpc": "2.0",
  "id": 487,
  "method": "workspace/_vs_mapCode",
  "params": {
    "_vs_mappings": [
      {
        "TextDocument": {
          "uri": "file:///<uri>.razor"
        },
        "Contents": [
          "@page \"/counter\"\n\n<PageTitle>Counter</PageTitle>\n\n<h1>Counter</h1>\n\n<p role=\"status\">Current count: @currentCount</p>\n\n<button class=\"btn btn-primary\" @onclick=\"IncrementCount\">Click me</button>\n"
        ],
        "FocusLocations": [
          [
            {
              "uri": "file:///<uri>.razor",
              "range": {
                "start": {
                  "line": 16,
                  "character": 5
                },
                "end": {
                  "line": 16,
                  "character": 5
                }
              }
            },
            {
              "uri": "file:///<uri>.razor",
              "range": {
                "start": {
                  "line": 16,
                  "character": 5
                },
                "end": {
                  "line": 16,
                  "character": 5
                }
              }
            }
          ]
        ]
      }
    ],
    "_vs_updates": null
  }
}

We would expect that no mapping edits are returned. This will let the fallback mapper handle the edits directly, which should replace the Counter.razor file with the contents provided.