bug, refactor, test: make pragma history_length work interactively history_length could be set interactively, but it was never used to set readline/pyreadline3's internal state. Using the pragma setting on the roundup-admin command line did set readline's state. Also refactored 2 calls to self.readline.get_current_history_length() into one call and storing in a variable. Also changed method for creating history strings for printing. Tests added for history_length pragma on cli and interactive use. Added test for exiting roundup-admin with EOF on input. Added test for 'readline nosuchdirective' error case. Added test to readline with a command directive to set an internal variable. This last one has no real test to see if it was successful because I can't emulate a real keyboard/tty which is needed to test.

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# package ecosystems to update and where the package manifests are
# located.
# Please see the documentation for all configuration options:
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version: 2
updates:
  - package-ecosystem: "pip"
    directory: "/" # Location of package manifests
    schedule:
      interval: "weekly"

  - package-ecosystem: "github-actions"
    # Workflow files stored in the
    # default location of `.github/workflows`
    directory: "/"
    schedule:
      interval: "weekly"
#  - package-ecosystem: "docker" 
#    directory: "/scripts/Docker" 
#    target-branch: "master" 
#    schedule:
#      interval: "weekly"