Remove orphaned table headers at page breaks

[patrickluoyu]

When a table spreads across two pages, the header is automatically repeated. However, an orphaned table header could exist on the previous page when the page break occurs exactly after the table header. This PR resolves the above-mentioned problem.

Signed-off-by: Patrick-LuoYu patrickluo@yunify.com

[patrickluoyu]

/assign @Mogztter

[ggrossetie]

Thanks for your contribution! Could you please provide an example where this issue can be reproduced so I can compare before/after?

[patrickluoyu]

For example, assume that we have the following ADOC file:

test.adoc

test

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[cols='1a,3a']
|===
|test header |test header

|test row 1
|test row 1

|test row 2
|test row 2
|===

And the following CSS file:

test.css

table {
  break-inside: auto;
}

tr {
  break-inside: avoid;
}

If we run asciidoctor-web-pdf test.adoc -a stylesheet="+test.css", this is what happens before:

And this is what happens after:

[ggrossetie]

Thanks, I will add a test case 👍🏻

[ggrossetie]

I cherry-picked your commit 348cc9fcad30664a2f33f005186aeb15526bbdf2 and added a test case. Thanks!