diff --git a/pytools/tag.py b/pytools/tag.py
index 0155e52163c69c2cf0a55913e1995dd62f245025..12e6b82b531e8ac2f12108721791788cd31d3b13 100644
--- a/pytools/tag.py
+++ b/pytools/tag.py
@@ -2,10 +2,9 @@ from __future__ import annotations
 from dataclasses import dataclass
 from typing import (Tuple, Any, FrozenSet)
 
-
-
 # {{{ dotted name
 
+
 class DottedName:
     """
     .. attribute:: name_parts
@@ -42,12 +41,14 @@ class DottedName:
                              "start with double underscores")
         return cls(name_parts)
 
+
 # }}}
 
 # {{{ tag
 
 tag_dataclass = dataclass(init=True, eq=True, frozen=True, repr=True)
 
+
 @tag_dataclass
 class Tag:
     """