Documentation for abort statement is missing

[lesquoyb]

Describe the bug
As the title says, there's no documentation for that statement.
Here is what I found about it:

• the keyword is listed in the exhaustive list of statement as it should
• however following the link from this page doesn't lead to anything, we are directed to the statements page that do not contain the abort keyword
• when hovering the abort keyword in gama I get the description of a reflex
• I can't find much code about that statement, not even a dedicated class

So my guess is that it simply is lacking documentation in the gama code