Prompt Error when using email in formatting

[jcubic]

Expected behavior

Email inside formatting is green

Actual behavior

it display blue duplicated email and formatting is broken.

Steps to reproduce

use this prompt

        prompt: function(cb) {
            var path = color('blue', cwd);
            cb([
                color('green', 'user@example.com'),
                ':',
                path,
                '$ '
            ].join(''));
        }

user@example.com as green is displayed blue (email) when you press enter (echo command function).

[jcubic]

In version 2.2.0