Log Message:
py-prompt_toolkit: updated to 3.0.27

3.0.27: 2022-02-07
------------------

New features:
- Support for cursor shapes. The cursor shape for prompts/applications can now
  be configured, either as a fixed cursor shape, or in case of Vi input mode,
  according to the current input mode.
- Handle "cursor forward" command in ANSI formatted text. This makes it
  possible to render many kinds of generated ANSI art.
- Accept `align` attribute in `Label` widget.
- Added `PlainTextOutput`: an output implementation that doesn't render any
  ANSI escape sequences. This will be used by default when redirecting stdout
  to a file.
- Added `create_app_session_from_tty`: a context manager that enforces
  input/output to go to the current TTY, even if stdin/stdout are attached to
  pipes.
- Added `to_plain_text` utility for converting formatted text into plain text.

Fixes:
- Don't automatically use `sys.stderr` for output when `sys.stdout` is not a
  TTY, but `sys.stderr` is. The previous behavior was confusing, especially
  when rendering formatted text to the output, and we expect it to follow
  redirection.