练习10.37答案有误

[JimLee1996]

https://github.com/applenob/Cpp_Primer_Practice/blob/master/excersize/ch10.md#%E7%BB%83%E4%B9%A01037

copy(v.crend() - 8, v.crend() - 3, back_inserter(l));

# 检验
copy(v.cbegin() + 3, v.cbegin() + 8, front_inserter(l));