diff --git a/org_rw/org_rw.py b/org_rw/org_rw.py
index 5c00e75..fdbd177 100644
--- a/org_rw/org_rw.py
+++ b/org_rw/org_rw.py
@@ -67,7 +67,9 @@ BASE_ENVIRONMENT = {
     ),
 }
 
-HEADLINE_TAGS_RE = re.compile(r"((?P<space_before_tags>\s+)(:(\w|[0-9_@#%])+)+:)(?P<space_after_tags>\s*)$")
+HEADLINE_TAGS_RE = re.compile(
+    r"((?P<space_before_tags>\s+)(:(\w|[0-9_@#%])+)+:)(?P<space_after_tags>\s*)$"
+)
 HEADLINE_RE = re.compile(r"^(?P<stars>\*+)(?P<spacing>\s+)(?P<line>.*?)$")
 KEYWORDS_RE = re.compile(
     r"^(?P<indentation>\s*)#\+(?P<key>[^:\[]+)(\[(?P<options>[^\]]*)\])?:(?P<spacing>\s*)(?P<value>.*)$"
@@ -2186,11 +2188,11 @@ def parse_headline(hl, doc, parent) -> Headline:
 
     if hl_tags is None:
         tags = []
-        space_before_tags = space_after_tags = ''
+        space_before_tags = space_after_tags = ""
     else:
         tags = hl_tags.group(0).strip()[1:-1].split(":")
-        space_before_tags = hl_tags.group('space_before_tags') or ''
-        space_after_tags = hl_tags.group('space_after_tags') or ''
+        space_before_tags = hl_tags.group("space_before_tags") or ""
+        space_after_tags = hl_tags.group("space_after_tags") or ""
         line = HEADLINE_TAGS_RE.sub("", line)
 
     hl_state = None
@@ -2212,10 +2214,10 @@ def parse_headline(hl, doc, parent) -> Headline:
 
     if len(tags) == 0:
         # No tags, so title might contain trailing whitespaces, handle it
-        title_ends_with_whitespace_match = re.search(r'\s+$', title)
+        title_ends_with_whitespace_match = re.search(r"\s+$", title)
         if title_ends_with_whitespace_match is not None:
             space_before_tags = title_ends_with_whitespace_match.group(0)
-            title = title[:-len(space_before_tags)]
+            title = title[: -len(space_before_tags)]
 
     contents = parse_contents(hl["contents"])
 
@@ -2448,7 +2450,9 @@ class OrgDoc:
     def dump_headline(self, headline, recursive=True):
         tags = headline.space_before_tags
         if len(headline.shallow_tags) > 0:
-            tags += ":" + ":".join(headline.shallow_tags) + ":" + headline.space_after_tags
+            tags += (
+                ":" + ":".join(headline.shallow_tags) + ":" + headline.space_after_tags
+            )
 
         state = ""
         if headline._state:
@@ -2456,13 +2460,7 @@ class OrgDoc:
 
         raw_title = token_list_to_raw(headline.title.contents)
 
-        yield (
-            "*" * headline.depth
-            + headline.spacing
-            + state
-            + raw_title
-            + tags
-        )
+        yield ("*" * headline.depth + headline.spacing + state + raw_title + tags)
 
         planning = headline.get_planning_line()
         if planning is not None: