Nested table should be unwrapped

[zbeyens]

Given

• A table inside a table

        <editor>
          <htable>
            <htr>
              <htd>
                <hp>a</hp>
                <htable>
                  <htr>
                    <htd>
                      <hp>b</hp>
                    </htd>
                    <htd>
                      <hp>c</hp>
                    </htd>
                  </htr>
                </htable>
              </htd>
            </htr>
          </htable>
        </editor>

When

• normalize

Then

• unwrap table, tr, td

        <editor>
          <htable>
            <htr>
              <htd>
                <hp>a</hp>
                <hp>b</hp>
                <hp>c</hp>
              </htd>
            </htr>
          </htable>
        </editor>