Tidy up and add flake8 config

.flake8

@@ -0,0 +1,4 @@
+[flake8]
+ignore = E203, E266, E501, E731, W503
+max-line-length = 80
+select = B,C,E,F,W,T4,B9

wasabi/tests/test_printer.py

@@ -160,4 +160,4 @@ def test_printer_none_encoding(monkeypatch):
     """Test that printer works even if sys.stdout.encoding is set to None. This
     previously caused a very confusing error."""
     monkeypatch.setattr("sys.stdout.encoding", None)
-    p = Printer()
+    p = Printer()  # noqa: F841

wasabi/tests/test_util.py

@@ -2,8 +2,7 @@
 from __future__ import unicode_literals, print_function
 
 import pytest
-import locale
-from wasabi.util import color, wrap, locale_escape, supports_ansi, format_repr
+from wasabi.util import color, wrap, locale_escape, format_repr
 
 
 def test_color():

wasabi/traceback.py

@@ -1,7 +1,7 @@
 # coding: utf8
 from __future__ import unicode_literals, print_function
 
-from .util import color, to_string, supports_ansi, locale_escape, NO_UTF8
+from .util import color, supports_ansi, NO_UTF8
 
 
 LINE_EDGE = "└─" if not NO_UTF8 else "|_"