[ci skip] Merge pull request #4986 from ka7/feature/spelling

Spelling fixes in comment blocks and docs
diff --git a/tests/codeigniter/helpers/date_helper_test.php b/tests/codeigniter/helpers/date_helper_test.php
index 8a35022..b419418 100644
--- a/tests/codeigniter/helpers/date_helper_test.php
+++ b/tests/codeigniter/helpers/date_helper_test.php
@@ -296,7 +296,7 @@
 		}
 
 		$this->assertArrayHasKey('UP3', timezones());
-		$this->assertEquals(0, timezones('non_existant'));
+		$this->assertEquals(0, timezones('non_existent'));
 	}
 
 	// ------------------------------------------------------------------------