Prompt-tool-kit

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Bug fixes:
- Fixed `Application.run_system_command` on Windows.
- Fixed bug in ANSI text formatting: correctly handle 256/true color sequences.
- Fixed bug in WordCompleter. Provide completions when there's a space before
the cursor.

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Bug fixes:
- Fixes the issue where changes made to the buffer in the accept handler were
not reflected in the history.
- Fix in the application invalidate handler. This prevents a significat slow
down in some applications after some time (especially if there is a refresh
interval).
- Make `print_container` utility work if the input is not a pty.

New features:
- Underline non breaking spaces instead of rendering as '&'.
- Added mouse support for radio list.
- Support completion styles for `READLINE_LIKE` display method.
- Accept formatted text in the display text of completions.
- Added a `FuzzyCompleter` and `FuzzyWordCompleter`.
- Improved error handling in Application (avoid displaying a meaningless
AssertionError in many cases).

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Bug fixes:
- Fixed assertion in PromptSession: the style_transformation check was wrong.
- Removed 'default' attribute in PromptSession. Only ask for it in the
`prompt()` method. This fixes the issue that passing `default` once, will
store it for all consequent calls in the `PromptSession`.
- Ensure that `__pt_formatted_text__` always returns a `FormattedText`
instance. This fixes an issue with `print_formatted_text`.

New features:
- Improved handling of situations where stdin or stdout are not a terminal.
(Print warning instead of failing with an assertion.)
- Added `print_container` utility.
- Sound bell when attempting to edit read-only buffer.
- Handle page-down and page-up keys in RadioList.
- Accept any `collections.abc.Sequence` for HSplit/VSplit children (instead of
lists only).
- Improved Vi key bindings: return to navigation mode when Insert is pressed.

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Bug fixes:
- Don't use the predefined ANSI colors for colors that are defined as RGB.
(Terminals can assign different color schemes for ansi colors, and we don't
want use any of those for colors that are defined like aabbcc for instance.)
- Fix in handling of CPRs when patch_stdout is used.

Backwards incompatible changes:
- Change to the `Buffer` class. Reset the buffer unless the `accept_handler`
returns `True` (which means: "keep_text"). This doesn't affect applications
that use `PromptSession`.

New features:
- Added `AdjustBrightnessStyleTransformation`. This is a simple style
transformation that improves the rendering on terminals with light or dark
background.
- Improved performance (string width caching and line height calculation).
- Improved `TextArea`:
* Exposed `focus_on_click`.
* Added attributes: `auto_suggest`, `complete_while_typing`, `history`,
`get_line_prefix`, `input_processors`.
* Made attributes writable: `lexer`, `completer`, `complete_while_typing`,
`accept_handler`, `read_only`, `wrap_lines`.

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Bug fixes:
- Fix in `DynamicContainer`. Return correct result for `get_children`. This
fixes a bug related to focusing.
- Properly compute length of `start`, `end` and `sym_b` characters of
progress bar.
- CPR (cursor position request) fix.

Backwards incompatible changes:
- Stop restoring `PromptSession` attributes when exiting prompt.

New features:
- Added `get_line_prefix` attribute to window. This opens many
possibilities:
* Line wrapping (soft and hard) can insert whitespace in front
of the line, or insert some symbols in front. Like the Vim "breakindent"
option.
* Single line prompts also support line continuations now.
* Line continuations can have a variable width.
- For VI mode: implemented temporary normal mode (control-O in insert mode).
- Added style transformations API. Useful for swapping between light and
dark color schemes. Added `swap_light_and_dark_colors` parameter to
`prompt()` function.
- Added `format()` method to ANSI formatted text.
- Set cursor position for Button widgets.
- Added `pre_run` argument to `PromptSession.prompt()` method.

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Bug fixes:
- Fix render height for rendering full screen applications in Windows.
- Fix in `TextArea`. Set `accept_handler` to `None` if not given.
- Go to the beginning of the next line when enter is pressed in Vi navigation
mode, and the buffer doesn't have an accept handler.
- Fix the `default` argument of the `prompt` function when called multiple
times.
- Display decomposed multiwidth characters correctly.
- Accept `history` in `prompt()` function again.

Backwards incompatible changes:
- Renamed `PipeInput` to `PosixPipeInput`. Added `Win32PipeInput` and
`create_input_pipe`.
- Pass `buffer` argument to the `accept_handler` of `TextArea`.

New features:
- Added `accept_default` argument to `prompt()`.
- Make it easier to change the body/title of a Frame/Dialog.
- Added `DynamicContainer`.
- Added `merge_completers` for merging multiple completers together.
- Add vt100 data to key presses in Windows.
- Handle left/right key bindings in Vi block insert mode.