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, 13 insertions, 11 deletions

diff --git a/examples/async_printing.py b/examples/async_printing.py
index a136d8e2..d7304661 100755
--- a/examples/async_printing.py
+++ b/examples/async_printing.py
@@ -12,17 +12,18 @@ from typing import List
 import cmd2
 from cmd2 import fg, style
 
-ALERTS = ["Watch as this application prints alerts and updates the prompt",
-          "This will only happen when the prompt is present",
-          "Notice how it doesn't interfere with your typing or cursor location",
-          "Go ahead and type some stuff and move the cursor throughout the line",
-          "Keep typing...",
-          "Move that cursor...",
-          "Pretty seamless, eh?",
-          "Feedback can also be given in the window title. Notice the alert count up there?",
-          "You can stop and start the alerts by typing stop_alerts and start_alerts",
-          "This demo will now continue to print alerts at random intervals"
-          ]
+ALERTS = [
+    "Watch as this application prints alerts and updates the prompt",
+    "This will only happen when the prompt is present",
+    "Notice how it doesn't interfere with your typing or cursor location",
+    "Go ahead and type some stuff and move the cursor throughout the line",
+    "Keep typing...",
+    "Move that cursor...",
+    "Pretty seamless, eh?",
+    "Feedback can also be given in the window title. Notice the alert count up there?",
+    "You can stop and start the alerts by typing stop_alerts and start_alerts",
+    "This demo will now continue to print alerts at random intervals",
+]
 
 
 class AlerterApp(cmd2.Cmd):
@@ -196,6 +197,7 @@ class AlerterApp(cmd2.Cmd):
 
 if __name__ == '__main__':
     import sys
+
     app = AlerterApp()
     app.set_window_title("Asynchronous Printer Test")
     sys.exit(app.cmdloop())