Drop the hyphen from e-mail and standardize on email.

The AP Stylebook changed this in 2011, and we're woefully inconsistent, so let's go with the standard.

props morganestes, voldemortensen, niallkennedy (for patching on the previous AP style).
fixes #26156.


git-svn-id: https://develop.svn.wordpress.org/trunk@33774 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-users-list-table.php

@@ -270,7 +270,7 @@ class WP_Users_List_Table extends WP_List_Table {
 			'cb'       => '<input type="checkbox" />',
 			'username' => __( 'Username' ),
 			'name'     => __( 'Name' ),
-			'email'    => __( 'E-mail' ),
+			'email'    => __( 'Email' ),
 			'role'     => __( 'Role' ),
 			'posts'    => __( 'Posts' )
 		);