[gardening] Fix several python-lint warnings

benchmark/scripts/test_Benchmark_Driver.py

@@ -17,7 +17,6 @@
 import os
 import time
 import unittest
-
 from StringIO import StringIO
 from imp import load_source
 

benchmark/scripts/test_utils.py

@@ -24,7 +24,6 @@
 
 import logging
 import sys
-
 from StringIO import StringIO
 from contextlib import contextmanager
 

utils/gyb_syntax_support/Node.py

@@ -1,5 +1,6 @@
 from __future__ import print_function
 import sys  # noqa: I201
+
 from kinds import SYNTAX_BASE_KINDS, kind_to_type, lowercase_first_word
 
 

utils/gyb_syntax_support/__init__.py

@@ -6,12 +6,14 @@
 from DeclNodes import DECL_NODES  # noqa: I201
 from ExprNodes import EXPR_NODES  # noqa: I201
 from GenericNodes import GENERIC_NODES  # noqa: I201
+
 from NodeSerializationCodes import SYNTAX_NODE_SERIALIZATION_CODES, \
     get_serialization_code, \
     verify_syntax_node_serialization_codes
 
 from PatternNodes import PATTERN_NODES  # noqa: I201
 from StmtNodes import STMT_NODES  # noqa: I201
+
 import Token
 from Trivia import TRIVIAS  # noqa: I201
 from TypeNodes import TYPE_NODES  # noqa: I201

utils/run-test

@@ -21,10 +21,8 @@ from swift_build_support.swift_build_support import (
     arguments,
     shell
 )
-
 from swift_build_support.swift_build_support.SwiftBuildSupport import \
     SWIFT_SOURCE_ROOT
-
 from swift_build_support.swift_build_support.targets import \
     StdlibDeploymentTarget
 

utils/scale-test

@@ -25,7 +25,6 @@ import shutil
 import subprocess
 import sys
 import tempfile
-
 from collections import namedtuple
 from operator import attrgetter
 

utils/vim/swift-indent.py

@@ -88,7 +88,7 @@ def main(argc, argv):
     lines = stdout.decode(encoding).split('\n')
     sequence = difflib.SequenceMatcher(None, buf, lines)
     for op in reversed(sequence.get_opcodes()):
-        if op[0] is not 'equal':
+        if op[0] != 'equal':
             vim.current.buffer[op[1]:op[2]] = lines[op[3]:op[4]]