Preserving comment type (block or line) by pretty-printing.

Motivation and Context

Description

I changed the type Wrap.comment to record the kind of comment (block or line). I also fixed a bug in the pretty-printer of JsLIGO: comments attached to attributes were not printed (there were in CameLIGO).

Component

• compiler
• website
• webide
• vscode-plugin
• debugger

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Performance improvement (non-breaking change that improves performance)
• None (change with no changelog)

Changelog

With the last release of LIGO, the pretty-printers of CameLIGO and JsLIGO transformed all comments into block comments. This is a mistake, as block comments can be nested.

Checklist:

• Changes follow the existing coding style (use dune @fmt to check).
• Tests for the changes have been added (for bug fixes / feature).
• Documentation has been updated.
• Changelog description has been added (if appropriate).
• Start titles under ## Changelog section with #### (if appropriate).
• There is no image or uploaded file in changelog
• Examples in changed behaviour have been added to the changelog (for breaking change / feature).