Revert "* remove trailing spaces. [ci skip]"

This reverts commit 27d0d7c0d3.

vm_insnhelper.c

@@ -2318,7 +2318,7 @@ vm_call_iseq_setup_tailcall(rb_execution_context_t *ec, rb_control_frame_t *cfp,
 		  iseq->body->stack_max);
 
     cfp->sp = sp_orig;
-
+ 
     return Qundef;
 }