imports: sort imports everywhere in Spack (#24695)

* fix remaining flake8 errors

* imports: sort imports everywhere in Spack

We enabled import order checking in #23947, but fixing things manually drives
people crazy. This used `spack style --fix --all` from #24071 to automatically
sort everything in Spack so PR submitters won't have to deal with it.

This should go in after #24071, as it assumes we're using `isort`, not
`flake8-import-order` to order things. `isort` seems to be more flexible and
allows `llnl` mports to be in their own group before `spack` ones, so this
seems like a good switch.

1 files changed, 4 insertions, 6 deletions

diff --git a/lib/spack/spack/util/spack_yaml.py b/lib/spack/spack/util/spack_yaml.py
index 24eea88b77..a67b6491f8 100644
--- a/lib/spack/spack/util/spack_yaml.py
+++ b/lib/spack/spack/util/spack_yaml.py
@@ -17,17 +17,15 @@ import re
 import sys
 from typing import List  # novm
 
-from ordereddict_backport import OrderedDict
-from six import string_types, StringIO
-
 import ruamel.yaml as yaml
-from ruamel.yaml import RoundTripLoader, RoundTripDumper
+from ordereddict_backport import OrderedDict
+from ruamel.yaml import RoundTripDumper, RoundTripLoader
+from six import StringIO, string_types
 
-from llnl.util.tty.color import colorize, clen, cextra
+from llnl.util.tty.color import cextra, clen, colorize
 
 import spack.error
 
-
 if sys.version_info >= (3, 3):
     from collections.abc import Mapping  # novm
 else: