Source

File: wp-admin/includes/class-wp-ms-users-list-table.php

public function display_rows() {
		foreach ( $this->items as $user ) {
			$class = '';

			$status_list = array(
				'spam'    => 'site-spammed',
				'deleted' => 'site-deleted',
			);

			foreach ( $status_list as $status => $col ) {
				if ( $user->$status ) {
					$class .= " $col";
				}
			}

			?>
			<tr class="<?php echo trim( $class ); ?>">
				<?php $this->single_row_columns( $user ); ?>
			</tr>
			<?php
		}
	}