Replace it's by its.

diff --git a/src/doc/book/mutability.md b/src/doc/book/mutability.md
index 35a286a0d311a74a025352e95637267e4c8133e5..a0a49d55e105740572194aedfd870f25534b1a50 100644 (file)
--- a/src/doc/book/mutability.md
+++ b/src/doc/book/mutability.md
@@ -62,7 +62,7 @@ Note that here, the `x` is mutable, but not the `y`.
 # Interior vs. Exterior Mutability
 
 However, when we say something is ‘immutable’ in Rust, that doesn’t mean that
-it’s not able to be changed: we are referring to it's ‘exterior mutability’ that
+it’s not able to be changed: we are referring to its ‘exterior mutability’ that
 in this case is immutable. Consider, for example, [`Arc<T>`][arc]:
 
 ```rust