Changed "Expecting" to reflect the name of the function that handles user
error.

See modified contents.
	modified:   $assets/js/register.js
	modified:   -developer/xjs/register/js.php
	modified:   -developer/xjs/register/test/expected/empty_email.js
	modified:   -developer/xjs/register/test/expected/invalid_email.js
	modified:   -developer/xjs/register/test/expected/mismatch_email.js
empty_email_repeat test added
	modified:   $assets/js/register.js
	modified:   -developer/xjs/register/js.php
	new file:   -developer/xjs/register/test/expected/empty_email_repeat.js