* Initial commit for MCFunction Lexer + tests

* Apply suggestions from code review

Co-authored-by: Jean Abou-Samra <jean@abou-samra.fr>

* added docstring info + fix for run ... command

* remove string ending Error tokens

* not working - refactor in-progress

* fixed: generic property

* Update pygments/lexers/mcfunction.py

Co-authored-by: Georg Brandl <georg@python.org>

* apply some fixes from comments

* Update pygments/lexers/mcfunction.py

Co-authored-by: Georg Brandl <georg@python.org>

* spacing

* updated tests and applied more suggestions

* fixed comment regex, passes tests

Co-authored-by: Jean Abou-Samra <jean@abou-samra.fr>
Co-authored-by: Georg Brandl <georg@python.org>

Adds recognition of 'def'/'type^'/'type~' keywords and adds some
missing characters to the regexes for identifiers and punctuation.

Nested type names were being highlighted as if they were function names.

Now a phrase like `Spec.Process.run` is highlighted properly as:
- `Name.Class`
- `Punctuation`
- `Name.Class`
- `Punctuation`
- `Name.Function`

Instead of wrongly highlighted as it was before this commit:
- `Name.Class`
- `Punctuation`
- `Name.Function`
- `Punctuation`
- `Name.Function`

Now the Savi lexer can tokenize string interpolation inside strings,
which is a new feature added to Savi since the last time this
lexer was updated.

Prior to this change, every underscore/private identifier
in Savi code was being highlighted as if it were a class name.
After this change, only those whose first letter is uppercase
will be highlighted as such, which is the correct behavior.

The previous example shows the old usage of the testing framework.
Now the example reflects the current usage/API of that framework.

* Add Macaulay2 lexer

* Update symbols for Macaulay2 1.18

* Match whitespace characters in Macaulay2 lexer

* Add states for strings/comments in Macaulay2 lexer

* Update Macaulay2 lexer tests for string/comment edge cases

* Improve comment and string matching in Macaulay2 lexer

Instead of matching each character one at a time, we match all
characters without special meaning together.

* Update Macaulay2 test output

* Update Macaulay2 lexer symbols for 1.19 release

* Move "auto-generated" comment in Macaulay2 lexer down a few lines

* Fix underline length in Macaulay2 lexer docstring

* Add url field for Macaulay2 lexer

* Bump copyright year for Macaulay2 lexer

Uxn is a virtual machine which represents a personal computing
playground, and is described here:

    https://100r.co/site/uxn.html

Uxntal assembly language is described here:

    https://wiki.xxiivv.com/site/uxntal.html

The demo code piano.tal is used with permission.