Improve a few docstrings in packaging.
Also beautify import lists. Having them grouped by lenght makes it slightly
easier to look for a module.
diff --git a/Lib/packaging/util.py b/Lib/packaging/util.py
index 748686d..ddb8ed9 100644
--- a/Lib/packaging/util.py
+++ b/Lib/packaging/util.py
@@ -1,19 +1,18 @@
-"""packaging.util
-Miscellaneous utility functions.
-"""
-import errno
-import csv
-import hashlib
+"""Miscellaneous utility functions."""
+
import os
-import sys
import re
+import csv
+import sys
+import errno
import shutil
import string
+import hashlib
import tarfile
import zipfile
import posixpath
-import sysconfig
import subprocess
+import sysconfig
from glob import iglob as std_iglob
from fnmatch import fnmatchcase
from inspect import getsource