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, 1 insertions, 0 deletions

diff --git a/examples/dynamic_commands.py b/examples/dynamic_commands.py
index 620acb7f..4fc2629f 100755
--- a/examples/dynamic_commands.py
+++ b/examples/dynamic_commands.py
@@ -13,6 +13,7 @@ CATEGORY = 'Dynamic Commands'
 
 class CommandsInLoop(cmd2.Cmd):
     """Example of dynamically adding do_* commands."""
+
     def __init__(self):
         # Add dynamic commands before calling cmd2.Cmd's init since it validates command names
         for command in COMMAND_LIST: