Unexpected converstion of heading into lists when text starts with numbers

[lofcz]

Describe the bug
Whenever converting HTML with headings <h1> to <h6> with content starting with a number a bug occurs converting the heading incorrectly, below are some test cases:

<h2>1 Evokace (10 minut)</h2>  <!-- bug 1.1 Evokace (10 minut) -->
<h2>1. Evokace (10 minut)</h2> <!-- bug 1.1 Evokace (10 minut) -->
<h2>1-Evokace (10 minut)</h2> <!-- bug: 1.1 Evokace (10 minut) -->
<h6>22 Evokace (10 minut)</h6> <!-- bug: 1.1.1.1.1.1 Evokace (10 minut) -->
<h2>Evokace 1 (10 minut)</h2> <!-- ok -->

I've used LibreOffice to open the exported document, an example of the <h6> case:

Expected behavior
The heading is transformed correctly. This is specific to headings and does not occur with other tags (I've tested <p> and <pre>). I believe the issue lies here:

html2openxml/src/Html2OpenXml/Expressions/Numbering/HeadingElementExpression.cs

Line 45 in 78f026c

if (runElement != null && IsNumbering(runElement))

where we use IsNumbering aggressively.

Repro
See the table above.

[onizet]

Hello,

Yes I'm agree this code is aggressively detecting heading numbers but it's also because everyone want the system to work out of box magically. Hard to please everyone...

Is there any reason why you jump from h2 to h6?
What would you have expected: none of the heading turned to numbering? If so, I can propose a new property to turn on/off this feature.

[lofcz]

h2 to h6 is just an example test case, this affects any hx element.

What would you have expected: none of the heading turned to numbering?

Correct.

The new property approach is exactly what I had in mind for addressing this, is there a convention for html2openxml "shims" already?

[lofcz]

Closing as done, thanks for working on this!