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Update src/traits/caching.md 

Co-Authored-By: csmoe <csmoe@msn.com>
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Who? Me?! 2018-10-25 11:33:44 +08:00
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@ -37,7 +37,7 @@ we would [confirm] `ImplCandidate(22)`, which would (as a side-effect) unify
[confirm]: ./resolution.html#confirmation [confirm]: ./resolution.html#confirmation
Now, at some later time, we might come along and see a `usize : Now, at some later time, we might come along and see a `usize :
Foo<$u>`. When placeholder, this would yield `usize : Foo<$0>`, just as Foo<$u>`. When replaced with a placeholder, this would yield `usize : Foo<$0>`, just as
before, and hence the cache lookup would succeed, yielding before, and hence the cache lookup would succeed, yielding
`ImplCandidate(22)`. We would confirm `ImplCandidate(22)` which would `ImplCandidate(22)`. We would confirm `ImplCandidate(22)` which would
(as a side-effect) unify `$u` with `isize`. (as a side-effect) unify `$u` with `isize`.