Add test showing section issue

[alex-broad]

This test fails with:

● pureGetEdits › rename › updates files linking to a section in the moved file in a table

    expect(received).toEqual(expected) // deep equality

    - Expected  - 2
    + Received  + 2

    @@ -1,12 +1,12 @@
      Array [
        Object {
    -     "newText": "folder/newfolder/file-2.md#heading",
    +     "newText": "folder/newfolder/file-2.md",
          "path": "file-1.md",
          "range": Object {
            "end": Object {
    -         "character": 50,
    +         "character": 42,
              "line": 1,
            },
            "start": Object {
              "character": 26,
              "line": 1,

      30 |       const edits = pureGetEdits(event, markdownFiles, options);
      31 | 
    > 32 |       expect(edits).toEqual(
         |                     ^
      33 |         expectedEdits.map((e) => {
      34 |           const [start, end] = e.range.split("-");
      35 |           const [startLine, startCharacter] = start.split(":");

      at testRename (src/__tests__/pure-get-edits.test.ts:32:21)
      at Object.<anonymous> (src/__tests__/pure-get-edits.test.ts:757:7)

Will raise issue shortly.