Revert require_once to require

Author: kenjis

system/Debug/Exceptions.php

@@ -35,7 +35,7 @@
  * @filesource
  */
 
-require_once dirname(__FILE__).'/CustomExceptions.php';
+require dirname(__FILE__).'/CustomExceptions.php';
 
 class Exceptions
 {

tests/CLI/CLITest.php

@@ -0,0 +1,10 @@
+<?php namespace CodeIgniter\CLI;
+
+class CLITest extends \CIUnitTestCase
+{
+	public function testNew()
+	{
+		$actual = new CLI();
+		$this->assertInstanceOf(CLI::class, $actual);
+	}
+}

tests/Debug/ExceptionsTest.php

@@ -0,0 +1,10 @@
+<?php namespace CodeIgniter\Debug;
+
+class ExceptionsTest extends \CIUnitTestCase
+{
+	public function testNew()
+	{
+		$actual = new Exceptions();
+		$this->assertInstanceOf(Exceptions::class, $actual);
+	}
+}