update

calling-convention/Output-explanation.md

@@ -20,8 +20,10 @@ RS points to: 4
 Clean stack: []
 RS: 0
 Collected result: {'result': {'type': 'result', 'value': 42}}
+```
 
 **Explanation:**
+
 Since there is only one argument and it fits in a single register, it is
 placed directly in `RA` (the first available argument register).
 Before the call, the 4 caller-saved registers (R0-R3) are pushed onto the