Update part15.rs: a trivial typo

diff --git a/src/part15.rs b/src/part15.rs
index e646d342d417763bb4aa2778550217ba19645652..e22d507c615328be99e338ff892001640bffdd28 100644 (file)
--- a/src/part15.rs
+++ b/src/part15.rs
@@ -28,7 +28,7 @@ use std::time::Duration;
 //@ Rather than giving every field a name, a struct can also be defined by just giving a sequence
 //@ of types (similar to how a variant of an `enum` is defined). This is called a *tuple struct*.
 //@ It is often used when constructing a *newtype*, as we do here: `ConcurrentCounter` is
 //@ Rather than giving every field a name, a struct can also be defined by just giving a sequence
 //@ of types (similar to how a variant of an `enum` is defined). This is called a *tuple struct*.
 //@ It is often used when constructing a *newtype*, as we do here: `ConcurrentCounter` is

-//@ essentially just a new name for `Arc<Mutex<usize>>`. However, is is a locally declared types,
+//@ essentially just a new name for `Arc<Mutex<usize>>`. However, it is a locally declared types,

 //@ so we can give it an inherent implementation and implement traits for it. Since the field is
 //@ private, nobody outside this module can even know the type we are wrapping.
 
 //@ so we can give it an inherent implementation and implement traits for it. Since the field is
 //@ private, nobody outside this module can even know the type we are wrapping.