I18N: Capitalize translator comments consistently, add trailing punctuation.

Includes minor code layout fixes.

See #44360.

git-svn-id: https://develop.svn.wordpress.org/trunk@45932 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/network/users.php

@@ -73,7 +73,7 @@ if ( isset( $_GET['action'] ) ) {
 								if ( is_super_admin( $user->ID ) ) {
 									wp_die(
 										sprintf(
-											/* translators: %s: user login */
+											/* translators: %s: User login. */
 											__( 'Warning! User cannot be modified. The user %s is a network administrator.' ),
 											esc_html( $user->user_login )
 										)
@@ -276,7 +276,7 @@ if ( isset( $_REQUEST['updated'] ) && $_REQUEST['updated'] == 'true' && ! empty(
 	endif;
 
 	if ( strlen( $usersearch ) ) {
-		/* translators: %s: search keywords */
+		/* translators: %s: Search query. */
 		printf( '<span class="subtitle">' . __( 'Search results for &#8220;%s&#8221;' ) . '</span>', esc_html( $usersearch ) );
 	}
 	?>