Adds pre-commit config to run various lintersci_improvements

This ads black, isort, pyupgrade, and flake8 to pre-commit-config.yaml
There are also some small changes to travis.yml and tasks.py to reduce
some repeated configurations that should be consolidated into
setup.cfg. Most other changes are automated by the linter scripts.

1 files changed, 7 insertions, 10 deletions

diff --git a/tests_isolated/test_commandset/conftest.py b/tests_isolated/test_commandset/conftest.py
index 037be199..d6968575 100644
--- a/tests_isolated/test_commandset/conftest.py
+++ b/tests_isolated/test_commandset/conftest.py
@@ -7,10 +7,10 @@ from contextlib import redirect_stderr, redirect_stdout
 from typing import List, Optional, Union
 from unittest import mock
 
+from cmd2_ext_test import ExternalTestMixin
 from pytest import fixture
 
 import cmd2
-from cmd2_ext_test import ExternalTestMixin
 from cmd2.utils import StdSim
 
 # Prefer statically linked gnureadline if available (for macOS compatibility due to issues with libedit)
@@ -26,9 +26,9 @@ except ImportError:
         pass
 
 
-def verify_help_text(cmd2_app: cmd2.Cmd,
-                     help_output: Union[str, List[str]],
-                     verbose_strings: Optional[List[str]] = None) -> None:
+def verify_help_text(
+    cmd2_app: cmd2.Cmd, help_output: Union[str, List[str]], verbose_strings: Optional[List[str]] = None
+) -> None:
     """This function verifies that all expected commands are present in the help text.
 
     :param cmd2_app: instance of cmd2.Cmd
@@ -157,12 +157,7 @@ def base_app():
 
 
 # These are odd file names for testing quoting of them
-odd_file_names = [
-    'nothingweird',
-    'has   spaces',
-    '"is_double_quoted"',
-    "'is_single_quoted'"
-]
+odd_file_names = ['nothingweird', 'has   spaces', '"is_double_quoted"', "'is_single_quoted'"]
 
 
 def complete_tester(text: str, line: str, begidx: int, endidx: int, app) -> Optional[str]:
@@ -181,6 +176,7 @@ def complete_tester(text: str, line: str, begidx: int, endidx: int, app) -> Opti
              Matches are stored in app.completion_matches
              These matches also have been sorted by complete()
     """
+
     def get_line():
         return line
 
@@ -199,6 +195,7 @@ def complete_tester(text: str, line: str, begidx: int, endidx: int, app) -> Opti
 
 class WithCommandSets(ExternalTestMixin, cmd2.Cmd):
     """Class for testing custom help_* methods which override docstring help."""
+
     def __init__(self, *args, **kwargs):
         super(WithCommandSets, self).__init__(*args, **kwargs)