- Update to 0.9.22:
  - Fixed bug where a redefined ansi.style_error was not being
    used in all cmd2 files
  - Enabled line buffering when redirecting output to a file
  - Added align_left(), align_center(), and align_right() to
    utils.py. All 3 of these functions support ANSI escape
    sequences and characters with display widths greater than 1.
    They wrap align_text() which is also in utils.py.
  - Fixed bug where pipe processes were not being stopped by Ctrl-C
  - Added exception handling to account for non-standard Python
    environments in which readline is not loaded dynamically from
    a shared library file
  - Added read_input() function that is used to read from stdin.
    Unlike the Python built-in input(), it also has an argument
    to disable tab completion while input is being entered.
  - Added capability to override the argument parser class used
    by cmd2 built-in commands. See override_parser.py example for
    more details.
  - Added end argument to pfeedback() to be consistent with the
    other print functions like poutput().
  - Added apply_style to pwarning().
  - For consistency between all the print functions:
    - Made end and chop keyword-only arguments of ppaged()
    - end is always added to message in ppaged()

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