Change commenters email to display name

Question

wordpress's default Recent Comments widget is showing the user's email address instead of their display/first name..

get_comment_author() just changes the email address to 'anonymous'....

What do I change exactly to make it show the commenter's name instead?

$output .= sprintf( _x( '%1$s on %2$s', 'widgets' ),
                '' . get_comment_author_link( $comment ) . '',
                '<a href="' . esc_url( get_comment_link( $comment ) ) . '">' . 
get_the_title( $comment->comment_post_ID ) . '</a>'                 
            );

Answer 1

Simply use get_comment_author_email. See here for more information.

Answer 2

Ok guys, sorry I figured this out. I'm still learning WP's codex...

the following worked:

get_comment_author($comment), but it was showing old usernames after I had changed the users so that they would have user names... my bad :(