DO not print files for parameters declaration, exogenous variables declarations
or parameter values if the selected equations do not have parameters and/or
exogenous variables (typically accounting identities).
Renamed the auxiliary variables for PAC/VAR expectations unrolled
expressions. Using shorter prefixes, PE_ and VE_ instead of pac_expectation and
var_expectations.
Extracts equations from a mod file and produce .inc files (equations, lists of
parameters, endogenous variables and exogenous variables) that can be included
in a mod file that will be used to simulate the model.
If an innovation has a tag `(used='estimationonly')` it will be excluded from
the generated files (ie list of shocks and equations).