ivaynberg/select2 — pull request #2156 by ruimarinho (2014-03-03 01:13:31+00:00)
Title: Add placeholder support to angular models

When the ngModel directive is used, angular automatically inserts an
empty
element if the
model does not have any value selected. This prevents the correct
functionality of the placeholder because the value echoed by angular is
not empty (rather, it prints a question mark). The only alternative
would be passing a custom function to every select2 instance for
comparison.