Create API for /setting/ line number

[fulldecent]

There is a desire to /set/ line numbers on XML nodes. This is for constructed nodes.

Please see downstream discussion at rubys/nokogumbo#53 (comment)

Related, also see discussion on libxml and line numbers greater than 65535 (and workarounds) at:

• Nokogiri::HTML5 does not support line numbers rubys/nokogumbo#53 (comment)
• Include line numbers from the parser. rubys/nokogumbo#55
• XML line limit #533

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PR coming

[fulldecent]

PR added at #1658

[flavorjones]

@fulldecent you seem to be bringing up two distinct issues here:

• a feature request, to set line numbers on nodes.
• a bug report about line numbers being limited to a short int, which is unfortunately a limitation in libxml2's data structure; Nokogiri here is behaving exactly as the libxml2 maintainers wish/constrain it to.

The first is being addressed in your PR at #1658, which is where I'd like to focus the conversation about that feature request.

The second has been discussed in the issue you reference, and so unless there's new information or a concrete suggestion on how to address this behavior (I don't see one here?), I'd prefer to not reopen that discussion.

So, I'm going to close this issue out -- let's continue the API conversation at #1658.

[fulldecent]

Got it. I understand the short int issue and am not looking to rock the boat on libxml.