A bit of cleanup to the config.
A bit of cleanup to the config.

Replace " with ' and document the desired format for categories.


Former-commit-id: 5ff45c38bb77d6e0d2d26b53726840f7a63bd65d
guilherme-pg/citationhunt,eggpi/citationhunt,eggpi/citationhunt,guilherme-pg/citationhunt,guilherme-pg/citationhunt,guilherme-pg/citationhunt,eggpi/citationhunt,eggpi/citationhunt