Fix typo Arbintrary to Arbitrary
Fix typo Arbintrary to Arbitrary

Signed-off-by: Rustin-Liu <c7d168847ad25898cad3ce2d480246882ded574b@gmail.com>

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust