Some pycodestyle cleanups

Signed-off-by: Michael Moese <mmoese@suse.com>

app.py

@@ -9,26 +9,31 @@ app.config['FLATPAGES_EXTENSION'] = '.md'
 
 pages = FlatPages(app)
 
+
 @app.route('/<path:path>.html')
 def page(path):
     page = pages.get_or_404(path)
     return render_template('page.html', page=page)
 
+
 @app.route('/verein.html')
 def verein():
     return render_template('verein.html')
 
+
 @app.route('/impressum.html')
 def impressum():
     return render_template('impressum.html')
 
+
 @app.route('/')
 @app.route('/index.html')
 def index():
     posts = [p for p in pages if "date" in p.meta]
-    sorted_pages = sorted(posts, reverse=True, key=lambda page:
+    sorted_pages = sorted(posts, reverse=True, key=lambda page
                           datetime.strptime(page.meta["date"], "%d %b %y"))
     return render_template('index.html', pages=sorted_pages)
 
+
 if __name__ == '__main__':
     app.run(host='0.0.0.0')