Fix some typos

src/doc/trpl/associated-types.md

@@ -170,7 +170,7 @@ let obj = Box::new(graph) as Box<Graph>;
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ```
 
-We can’t create a trait object like this, becuase we don’t know the associated
+We can’t create a trait object like this, because we don’t know the associated
 types. Instead, we can write this:
 
 ```rust

src/doc/trpl/documentation.md

@@ -529,7 +529,7 @@ This will create documentation for bar both inside the documentation for the
 crate `foo`, as well as the documentation for your crate. It will use the same
 documentation in both places.
 
-This behavior can be supressed with `no_inline`:
+This behavior can be suppressed with `no_inline`:
 
 ```ignore
 extern crate foo;