sw HTML export: fix invalid HTML when all cells of a row have the same rowspan

The bugdoc has a table with 2 columns and 2 rows, but both the A1 and
the A2 cell has rowspan=2, so there are only covered cells in the second
row. It seems there is no valid HTML markup to express this Writer doc
model.

What HTML seems to suggest instead is to simply decrease the amount of
rowspan attribute values and then the empty <tr> elements can be simply
skipped.

This fixes the

Row 2 of a row group established by a tbody element has no cells beginning on it.

from the w3c HTML validator.

Note that you can't create such problematic tables on the UI: the UI
will delete the row only containing covered cells for you when the last
cell gets merged. Such documents can be created by importers, though.

Change-Id: Ice4fa3636e8b780d374f3d319b198aaaada9f5e0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/145402
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins
(cherry picked from commit a2fb3a135425bbc14375e1edfcc1e09a41d760f9)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/145434
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

0 files changed, 0 insertions, 0 deletions