runtime: Minor cleanup and extra comments around interpreter

Change-Id: I24c0b261de8cf737babd9d01bf679482d48c8bc9
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index 835b94a..8c9222f 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -666,7 +666,7 @@
 inline void Class::VisitReferences(mirror::Class* klass, const Visitor& visitor) {
   VisitInstanceFieldsReferences<kVisitClass>(klass, visitor);
   // Right after a class is allocated, but not yet loaded
-  // (kStatusNotReady, see ClassLinkder::LoadClass()), GC may find it
+  // (kStatusNotReady, see ClassLinker::LoadClass()), GC may find it
   // and scan it. IsTemp() may call Class::GetAccessFlags() but may
   // fail in the DCHECK in Class::GetAccessFlags() because the class
   // status is kStatusNotReady. To avoid it, rely on IsResolved()