320press/wordpress-bootstrap — comment on commit acc7ce0c142008d5397b28695d61096e6d79c3c7
File:  line 0
By GerritKuilder:

Could be, I know that if you use the standard edit_post_link() is used the class is not added and you don't get the button formatting.
As a sidenote: The editlink only works for me on my linux machine, on windows I don't get the button at all...