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-rw-r--r--src/doc/trpl/mutability.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/doc/trpl/mutability.md b/src/doc/trpl/mutability.md
index 9a9e38f7d0a..2c4316e651a 100644
--- a/src/doc/trpl/mutability.md
+++ b/src/doc/trpl/mutability.md
@@ -62,7 +62,7 @@ fn foo(mut x: i32) {
 # 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 mean something has ‘exterior mutability’. Consider,
+it’s not able to be changed: we mean something has ‘exterior mutability’. Consider,
 for example, [`Arc<T>`][arc]:
 
 ```rust