I broke email address validation with r1447. I changed...

I broke email address validation with r1447. I changed EmailAddressValidator.isValid() to only accept email addresses without name part ('foo@bar.com' but not '"snafu" foo@bar.com') because AccountSetupBasics used it to verify the email address for an account. With the old validator spaces were allowed in the email field but lead to an exception later (issue 849). Unfortunately I missed the fact that there are implicit calls to isValid() to validate email addresses e.g. in the 'To field