Although there isn’t a syntax, you can still get close by using the built-in block comment buttons:
If you’re not viewing the Edit toolbar already, right-click on the toolbar and enable the Edit toolbar:
Then, select a block of code and hit the “Comment Block” button; or if it’s already commented out, use the “Uncomment Block” button:
Fast and easy!
prefix the comment with a single-quote. there is no need for an “end” tag.
‘this is a comment
Extend to multiple lines using the line-continuation character, _:
‘this is a multi-line _
comment
This is an option in the toolbar to select a line(s) of code and comment/uncomment: