[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

docs/special_topics.rst

@@ -44,10 +44,12 @@ referenced inside the media type's ``schema`` using its component name:
     from apispec.ext.marshmallow import MarshmallowPlugin
     from marshmallow import Schema, fields
 
+
     class FilterSchema(Schema):
         name = fields.String()
         limit = fields.Integer()
 
+
     spec = APISpec(
         title="Search API",
         version="1.0.0",