优化Connection类的getRealSql方法生成的sql

library/think/App.php

@@ -390,9 +390,7 @@ class App
 
         Hook::listen('action_begin', $call);
 
-        $data = self::invokeMethod($call);
-
-        return $data;
+        return self::invokeMethod($call);
     }
 
     /**

library/think/db/Connection.php

@@ -433,7 +433,7 @@ abstract class Connection
                     $sql . ' ');
             }
         }
-        return $sql;
+        return rtrim($sql);
     }
 
     /**