The module map itself: one entry per Python file, generated from the checkouts.
Generated by mix monty.module_map.gen; do not edit by hand, except to mark a
module :excluded or :partial with a reason, or to exclude a class and say
why.
It is a literal here rather than a file read at run time: the map is data, and the code that mirrors Monty should not be a reader of files it is told about.
sources/0 says which commit of each package these entries were read from.
A map generated before a checkout moved is a map of the commits it names, not
of the code beside it, and mix monty.module_map.verify says so.