Sign-in form displays raw span html in input fields

[nathanallen]

The http://localhost:3000/users/sign_in page shows <span class= in the input fields, and other HTML "debris" below them.

See screenshot:

Expected behavior:
Login field should say 'Login' (in english)
Password field should say 'Password' (in english)

Steps to reproduce:

1. logout
2. visit http://localhost:3000/users/sign_in
3. view the form fields to sign-in