make wording clearer

Author: L0uisc

src/ch10-02-traits.md

@@ -610,7 +610,7 @@ reduce duplication but also specify to the compiler that we want the generic
 type to have particular behavior. The compiler can then use the trait bound
 information to check that all the concrete types used with our code provide the
 correct behavior. In dynamically typed languages, we would get an error at
-runtime if we called a method on a type that the type didn’t implement. But
+runtime if we called a method on a type which didn’t implement the method. But
 Rust moves these errors to compile time so we’re forced to fix the problems
 before our code is even able to run. Additionally, we don’t have to write code
 that checks for behavior at runtime because we’ve already checked at compile