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Update src/subtyping.md 

Co-authored-by: Ryan Scheel <Ryan.havvy@gmail.com>
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pierwill 2022-07-27 09:22:18 -05:00 committed by GitHub
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@ -2,7 +2,7 @@
Subtyping is implicit and can occur at any stage in type checking or
inference. Subtyping is restricted to two cases:
variance with respect to lifetimes, and between types with higher ranked
variance with respect to lifetimes and between types with higher ranked
lifetimes. If we were to erase lifetimes from types, then the only subtyping
would be due to type equality.