Update E0185.md

Author: Dylan-DPC

src/librustc_error_codes/error_codes/E0185.md

@@ -19,8 +19,8 @@ impl Foo for Bar {
 ```
 
 When a type implements a trait's associated function, it has to use the same
-signature. So in this case, since `Foo::foo` doesn't take any argument and
-doesn't return anything, its implementation on `Bar` should be the same:
+signature. So in this case, since `Foo::foo` does not take any argument and
+does not return anything, its implementation on `Bar` should be the same:
 
 ```
 trait Foo {