fix typo ch04-02-references-and-borrowing.md#239
Open
billyio wants to merge 1 commit intorust-lang-ja:master-jafrom
Open
fix typo ch04-02-references-and-borrowing.md#239billyio wants to merge 1 commit intorust-lang-ja:master-jafrom
billyio wants to merge 1 commit intorust-lang-ja:master-jafrom
