Fix some some duplicate words.

src/test/codegen-units/item-collection/cross-crate-closures.rs

@@ -27,7 +27,7 @@ fn main() {
     //~ TRANS_ITEM fn cgu_extern_closures::inlined_fn_generic[0]::{{closure}}[0]<i32>
     let _ = cgu_extern_closures::inlined_fn_generic(3, 4, 5i32);
 
-    // Nothing should be generated for this call, we just link to the instance instance
+    // Nothing should be generated for this call, we just link to the instance
     // in the extern crate.
     let _ = cgu_extern_closures::non_inlined_fn(6, 7);
 }

src/test/run-pass/regions-lub-ref-ref-rc.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 // Test a corner case of LUB coercion. In this case, one arm of the
-// match requires a deref coercion and other other doesn't, and there
+// match requires a deref coercion and the other doesn't, and there
 // is an extra `&` on the `rc`. We want to be sure that the lifetime
 // assigned to this `&rc` value is not `'a` but something smaller.  In
 // other words, the type from `rc` is `&'a Rc<String>` and the type