A recent commit removed the "Thanks for you request!" at the start
of the find accounts email. As Alya Abbott pointed out, this line
actually helps us point out to the user that they are the ones who
requested the email in the first place, lowering the chances that
they'll misinterpret it as spam.
This is a follow-up to issue #19659.
The alt text of the leading images were displayed as preview
content in inbox by email clients like gmail. Since the leading
images were used mostly for decoration this made the preview
content gibberish. It's fine to set the alt attributes to empty
from accessibility point of view since the old alt attributes
did't added any meaningful information.