Certain links with @ symbols and periods break simplifiedAutoLink

[allanhortle]

type	link	status
characters between @ and .	http://website.com/img@x2.jpg	broken
no @	http://website.com/img-x2.jpg	ok
@ but no .	http://website.com/img@x2	ok
@ and . adjacent	http://website.com/img@.jpg	ok

Example: http://showdownjs.github.io/demo/#/http%3A%2F%2Fwebsite.com%2Fimg%40x2.jpg%0A%0Ahttp%3A%2F%2Fwebsite.com%2Fimg-x2.jpg%0A%0Ahttp%3A%2F%2Fwebsite.com%2Fimg%40x2%0A%0Ahttp%3A%2F%2Fwebsite.com%2Fimg%40.jpg

[tivie]

Thanks @allanhortle.

The problem here is the logic used to detect email addresses.

According to rfc6531, in the local part of the email (the part that comes before the @ symbol) the following characters are allowed:

• Uppercase and lowercase English letters (a-z, A-Z)
• Digits 0 to 9
• Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
• Character . (dot, period, full stop) provided that it is not the first or last character, and provided also that it does not appear two or more times consecutively.

This means something like this is a valid email website.com/img@x2.jpg

Right now, we basically allowed every character in the email's local part. A possible fix is to be explicit email parsing regex.

This will fix http://website.com/img@x2.jpg but not website.com/img@x2.jpg, since it's impossible to know if it's an email or a link

[tivie]

should be fixed now