Comment and format

pipenv/utils.py

@@ -1281,6 +1281,7 @@ def fs_str(string):
 _fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
 
 
+# Duplicated from Pew to avoid importing it (performance considerations).
 def get_workon_home():
     from ._compat import Path
     workon_home = os.environ.get('WORKON_HOME')
@@ -1288,5 +1289,8 @@ def get_workon_home():
         if os.name == 'nt':
             workon_home = '~/.virtualenvs'
         else:
-            workon_home = os.sep.join([os.environ.get('XDG_DATA_HOME', '~/.local/share'), 'virtualenvs'])
+            workon_home = os.path.join(
+                os.environ.get('XDG_DATA_HOME', '~/.local/share'),
+                'virtualenvs',
+            )
     return Path(os.path.expandvars(workon_home)).expanduser()