Sensitivity to universe ordering

[JasonGross]

The minimizer should consider the following messages equivalent:

File "/tmp/tmprl1zib8j/bug_01.v", line 2308, characters 58-63:
Error:
In environment
it : ident * type
The term "mpred" has type "Type@{max(Set+1, bug_01.45)}"
while it is expected to have type "Type@{bug_01.833}"
(universe inconsistency).

and

File "./bug_01.v", line 1067, characters 58-63:
Error:
In environment
it : ident * type
The term "mpred" has type "Type@{max(VST.msl.predicates_hered.3, Set+1)}"
while it is expected to have type "Type@{Top.bug_01.323}"
(universe inconsistency).

See coq-community/run-coq-bug-minimizer#2 (comment)