New User email producing issues.

[Benunc]

Issue Overview

New User email is plaintext, or otherwise broken.

Expected Behavior

It should either send a full html email, or not include html tags.

Current Behavior

When a new user is sent an email, the function here is broken.
https://github.com/WordImpress/Give/blob/master/includes/user-functions.php#L405-L446

specifically the error appears to be in this line:
https://github.com/WordImpress/Give/blob/master/includes/user-functions.php#L434

Here's a user screenshot of this error:

I was able to reproduce locally. Here's a screenshot

and here's the source from mailcatcher:

Password: [Password entered during donation]
<a href=3D"https://givepress.dev/wp-login.php"> Click Here to Login &raqu=
o;</a>

Possible Solution

Steps to Reproduce (for bugs)

1. Ensure that new user registration is required (disable logged out donations)
2. complete a donation
3. check the email that is sent

It will be broken.

[DevinWalker]

Close in favor of: #1346