fix some small formatting issues

api/models/i18n.py

@@ -2,6 +2,7 @@
 from datetime import datetime
 from api import db
 
+
 class Text(db.Model):
 
     __tablename__ = 'i18n-texts'

api/resources/categories.py

@@ -18,6 +18,7 @@ def list():
     }
     return jsonify(j)
 
+
 @mod.route("/<int:id>", methods=["GET"])
 def show(id):
     category = Category.query.get_or_404(id)