Remove spaces around concatenations

per request
diff --git a/system/core/Config.php b/system/core/Config.php
index ec852b1..b2689a6 100644
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -83,9 +83,9 @@
 				$script_dir .= '/';
 			}
 
-			$base_url = (is_https() ? 'https' : 'http') . '://'
-				. (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost')
-				. $script_dir;
+			$base_url = (is_https() ? 'https' : 'http').'://'
+				.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost')
+				.$script_dir;
 
 			$this->set_item('base_url', $base_url);
 		}