diff --git a/patoolib/fileutil.py b/patoolib/fileutil.py
index 4a7d810a..d9d9b3d2 100644
--- a/patoolib/fileutil.py
+++ b/patoolib/fileutil.py
@@ -81,7 +81,8 @@ def stripext(filename):
     """Return the basename without extension of given filename
     For compressed TAR archives, the filename without the .tar
     extension is returned, ie. output of 'a.tar.xz' will be
-    'a'."""
+    'a'.
+    """
     basename, _ = os.path.splitext(os.path.basename(filename))
     if basename.endswith(".tar") and basename != ".tar":
         basename, _ = os.path.splitext(basename)