Minor cleanup and style fixes in the Unit_test and Image_lib libraries
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index 86b77bf..1ab8b23 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -251,7 +251,7 @@
 		}
 		else
 		{
-			if (strpos($this->new_image, '/') === FALSE AND strpos($this->new_image, '\\') === FALSE)
+			if (strpos($this->new_image, '/') === FALSE && strpos($this->new_image, '\\') === FALSE)
 			{
 				$full_dest_path = str_replace('\\', '/', realpath($this->new_image));
 			}
@@ -1462,4 +1462,4 @@
 }
 
 /* End of file Image_lib.php */
-/* Location: ./system/libraries/Image_lib.php */
+/* Location: ./system/libraries/Image_lib.php */
\ No newline at end of file