Seeking feedback on RelateNG semantics for zero-length lines

[Martin Davis]

We're in the process of porting RelateNG [1] to GEOS [2].  It offers
benefits of performance, robustness, and increased functionality (e.g.
handling GeometryCollections).

RelateNG does have one slight change in semantics.  It treats a Zero-Length
Line to be topologically equal to a Point:

equalsTopo( LINESTRING(1 1, 1 1),  POINT(1 1) ) = TRUE

(the XML test for this is here:
https://github.com/libgeos/geos/blob/main/tests/xmltester/tests/validate/TestRelatePL.xml#L43
)

Note that RelateNG does fix some other issues with Zero-Length Lines, as
discussed in these issues:
https://github.com/locationtech/jts/issues/345
https://github.com/locationtech/jts/issues/1050

So the question is:  does anyone see any problems with allowing Zero-Length
Lines to test as equal to Points?

(Note: my opinion is that this is a beneficial change).

[1]
https://lin-ear-th-inking.blogspot.com/2024/05/jts-topological-relationships-next.html
[2] https://github.com/libgeos/geos/tree/main-relate-ng
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