[ci skip] Normalize tabs/spaces

Partial changes from PR #4016
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index c69283a..e813efd 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -779,7 +779,7 @@
 			$this->y_axis = 0;
 		}
 
-		//  Create the image handle
+		// Create the image handle
 		if ( ! ($src_img = $this->image_create_gd()))
 		{
 			return FALSE;
@@ -1195,7 +1195,7 @@
 			$x_axis += $this->orig_width - $wm_width;
 		}
 
-		//  Build the finalized image
+		// Build the finalized image
 		if ($wm_img_type === 3 && function_exists('imagealphablending'))
 		{
 			@imagealphablending($src_img, TRUE);