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Update src/borrow_check/region_inference/lifetime_parameters.md 

Co-Authored-By: lqd <remy.rakic+github@gmail.com>
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Niko Matsakis 2019-06-24 14:33:02 -04:00 committed by Who? Me?!
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src/borrow_check/region_inference/lifetime_parameters.md
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@ -15,7 +15,7 @@ fn foo<'a, 'b>(x: &'a u32, y: &'b u32) -> &'b u32 {
This example is intended not to compile, because we are returning `x`, This example is intended not to compile, because we are returning `x`,
which has type `&'a u32`, but our signature promises that we will which has type `&'a u32`, but our signature promises that we will
return a `&'b u32` value. But how are lifetimes like `'a` and `'b return a `&'b u32` value. But how are lifetimes like `'a` and `'b`
integrated into region inference, and how this error wind up being integrated into region inference, and how this error wind up being
detected? detected?