Fixed false positive with test_multiple_anagrams
Fixed false positive with test_multiple_anagrams

If the order returned by anagrams_for is different from the test
case's expected output, the test would fail while being correct.

Ordering both arrays before comparsion fixes the false positive.

exercism/xrust,medek/xrust,medek/xrust,petertseng/exercism-rust,spazm/xrust,petertseng/exercism-rust,spazm/xrust,stevejb71/xrust,stevejb71/xrust,sacherjj/rust,sacherjj/rust,sacherjj/rust,petertseng/exercism-rust,exercism/xrust