Upgrade Python version to 3.8

The "noqa" comments intended for getting the mccabe tool to ignore a
method's complexity needed to be moved as part of this, for some reason.

salt/salt/common.jinja2

@@ -1,4 +1,4 @@
-{% set python_version = '3.7' %}
+{% set python_version = '3.8' %}
 
 {% set app_dir = '/opt/tildes' %}
 {% set static_sites_dir = '/opt/tildes-static-sites' %}

tildes/tildes/models/topic/topic.py

@@ -441,8 +441,8 @@ class Topic(DatabaseModel):
 
         return False
 
-    @property  # noqa
-    def content_type(self) -> Optional[TopicContentType]:
+    @property
+    def content_type(self) -> Optional[TopicContentType]:  # noqa
         """Return the content's type based on the topic's attributes."""
         if self.is_text_type:
             if self.has_tag("ask.survey"):

tildes/tildes/views/topic.py

@@ -140,10 +140,10 @@ def post_group_topics(
     raise HTTPFound(location=new_topic.permalink)
 
 
-@view_config(route_name="home", renderer="home.jinja2")  # noqa
+@view_config(route_name="home", renderer="home.jinja2")
 @view_config(route_name="group", renderer="topic_listing.jinja2")
 @use_kwargs(TopicListingSchema())
-def get_group_topics(
+def get_group_topics(  # noqa
     request: Request,
     after: Optional[str],
     before: Optional[str],