Commas not ignored

[PlanetEarthSoftware]

The dot language specification says that ; and , are ignored.
https://graphviz.org/doc/info/lang.html#comments-and-optional-formatting

Semicolons and commas aid readability but are not required. Also, any amount of whitespace may be inserted between terminals.

I have a dot file that is rejected by DotParser because it has commas; it is accepted by the dot program. If I remove the commas the file is accepted by both. File attached.

7b.dot.zip