Fix typo in comment.
Fix typo in comment.

marijnh/acorn,TimothyGu/acorn,mysticatea/acorn,mysticatea/acorn,TimothyGu/acorn,marijnh/acorn,ternjs/acorn,marijnh/acorn,TimothyGu/acorn,ternjs/acorn,ternjs/acorn,mysticatea/acorn