package ansifmt

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0.3.0

Add Custom token type variant which takes a styling, for tokens without particular semantics.
Add Formatting.Element that supersedes Formatting.Tree.
Add Formatting.Interfaces.TO_ELEMENT interface which establishes the contract to convert to a formatting element that is used by formatting and printing utilitary functions such as format and IO.print_formatted.
Expose the Int8 module that is used by Color.
Add Token.number to easily construct a number literal token.

Remove Formatting.Tree, Formatting.TOKENIZABLE and its associated functions. Use Formatting.Element instead.
Remove the Prelude module. It has merged with the core Ansifmt module.
Remove print_formatted alias from the prelude. The function can still be found as IO.print_formatted.
Remove make_styling alias from the prelude. The function can still be found as Styling.create.

Renamed Utils to Internal.
Formatting is now a directory instead of a file containing all its submodules.
Added List.intersperse and List.singleton (used in Formatting.Element).
Added Bool.tautology (used in Formatting.Element).

Add color functions luminance and best_for_contrast. (by @chshersh in #5)
Add styling functions fg, bg, bold, dim, italic, underlined. (by @chshersh in #6)
Add styling composition with &. (by @chshersh in #6)
Add function make_rgb_hex to parse hexadecimal codes into RGB colors. (by @chshersh in #7)

Color.t and Color.Ground.t are now polymorphic variants. (by @chshersh in #5)

Util.parenthesize_if which is deemed unuseful and is kind of a duplicate of Tree.parenthesize_if in Formatting.

Fixed a bug where unwanted m characters would appear in the output before every colored token

Moved Formatting.tokenize and Formatting.format to a dedicated Formatting.Util submodule - it is common for users who wish to implement TOKENIZABLE to open Formatting, and Formatting.tokenize would then shadow the user's own function, making it cumbersome if the latter was recursive. This does not affect the Ansifmt prelude - format stays available.