diff --git a/ablog/__init__.py b/ablog/__init__.py
index cf9946b2..f7255c0b 100755
--- a/ablog/__init__.py
+++ b/ablog/__init__.py
@@ -7,6 +7,7 @@
 
 from .blog import CONFIG, Blog
 from .post import (
+    CheckFrontMatter,
     PostDirective,
     PostListDirective,
     UpdateDirective,
@@ -17,7 +18,6 @@
     process_postlist,
     process_posts,
     purge_posts,
-    CheckFrontMatter,
 )
 from .version import version as __version__
 
@@ -100,8 +100,7 @@ def setup(app):
 
 def config_inited(app, config):
     app.config.templates_path.append(get_html_templates_path())
-    app.config.matched_blog_posts = [os.path.splitext(ii)[0]
-                                     for ii in glob(config.blog_post_pattern)]
+    app.config.matched_blog_posts = [os.path.splitext(ii)[0] for ii in glob(config.blog_post_pattern)]
 
 
 def get_html_templates_path():
diff --git a/ablog/post.py b/ablog/post.py
index d5aaa76b..3ecf495d 100644
--- a/ablog/post.py
+++ b/ablog/post.py
@@ -12,8 +12,8 @@
 from docutils.parsers.rst.directives.admonitions import BaseAdmonition
 from feedgen.feed import FeedGenerator
 from sphinx.locale import _
-from sphinx.util.nodes import set_source_info
 from sphinx.transforms import SphinxTransform
+from sphinx.util.nodes import set_source_info
 
 import ablog
 
@@ -152,7 +152,7 @@ def run(self):
 
 class CheckFrontMatter(SphinxTransform):
     """Check the doctree for frontmatter meant for a blog post.
-    
+
     This is mutually-exclusive with the PostDirective. Only one much be used."""
 
     # Priority before 880 so that it runs before the `doctree-read` event
@@ -186,7 +186,7 @@ def apply(self):
                 elif isinstance(option_spec[key], directives.flag):
                     new_val = True
                 metadata[key] = new_val
-        
+
         node = PostNode()
         node.document = self.document
         node = _update_post_node(node, metadata, [])