* Add hole expressions
* Fix the issue of unreported holes
* Add tests
* New line in the end of the test file
* Update CHANGELOG
* Add hole expression to the docs
* Do not treat hole as a special type
* Update docs
* Update docs/sophia_features.md
Co-authored-by: Radosław Rowicki <35342116+radrow@users.noreply.github.com>
Co-authored-by: Radosław Rowicki <35342116+radrow@users.noreply.github.com>
