base: database script documentation formatting
base: database script documentation formatting

* Makes the documentation in scripts/database.py follow PEP257 rules.

Signed-off-by: Kamil Neczaj <f5effa4f8fb04510feb8c36db9502b05ce6bf54d@cern.ch>

tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio