Resolve issue #233 : Allow an out to be passed in `__call__` method of `Derham.Field`
Solves the following issue(s):
Closes #233 (closed)
Core changes:
Added an out and a tmp optional parameter to the __call__
method of Field
. This allow to avoid creating useless tmps when calling the same Field
on the same grid repetitively. Added a test to check that everything works.
Model-specific changes:
None
Documentation changes:
None