[code.haxe.org] Abstract types - Email address as abstract type

# Email address as abstract type - Abstract types - Haxe programming language cookbook

The following EmailAddress Abstract type example is based on the underlying standard String type, but sets the restriction that it can only represent a valid email address. If not, an exception will be thrown.

[https://code.haxe.org/category/abstract-types/emailaddress.html](https://code.haxe.org/category/abstract-types/emailaddress.html)

Open the linked EmailAddress abstract-type cookbook page and compare it with the issue text. The issue does not identify a documentation error or requested change, so first clarify what should be corrected before editing or adding tests.

Written by the indexing model from the issue text.