/usr/share/doc/cadabra/properties/Commuting.tex is in cadabra 1.46-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | \cdbproperty{Commuting}{}
Makes components commuting. This is completely analogous
to \subsprop{AntiCommuting} and in fact the default for all objects,
so usually does not need to be specified.
\cdbseeprop{AntiCommuting}
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