Login page: user can change password on " " but can't log in with new password.

[antonrinas]

There is a user:
login: admin
password: admin
role: administrator
STEPS TO REPRODUCE
Click "Lost your password?" on Login page and change it on " " (space character).
Try to login with new password.
EXPECTED RESULT: logging in.
ACTUAL RESULT: "ERROR: The password field is empty."

[swissspidy]

Simply not using trim() on the password in wp_authenticate() results in a incorrect_password error instead of empty_password. So that's only half of the deal.

I consider using trim() very helpful, e.g. when users accidentally hit space when typing in their password. Since someone rarely if ever changes their password to , I think the downsides outweigh the benefits.

[voldemortensen]

I agree with @swissspidy here. I don't think its a common use case to set a password as a space (or even multiples spaces). And I don't think its a use case that should be supported. I don't think we should go out of our way to support passwords that are that insecure.