Merge pull request #1349 from zancas/swap_super_sub_trait

This explanation incorrectly inverts the meaning of SuperTrait

Author: marioidival

src/trait/supertraits.md

@@ -8,7 +8,7 @@ trait Person {
     fn name(&self) -> String;
 }
 
-// Student is a supertrait of Person.
+// Person is a supertrait of Student.
 // Implementing Student requires you to also impl Person.
 trait Student: Person {
     fn university(&self) -> String;
@@ -18,8 +18,8 @@ trait Programmer {
     fn fav_language(&self) -> String;
 }
 
-// CompSciStudent (computer science student) is a supertrait of both Programmer 
-// and Student. Implementing CompSciStudent requires you to impl both subtraits.
+// CompSciStudent (computer science student) is a subtrait of both Programmer 
+// and Student. Implementing CompSciStudent requires you to impl both supertraits.
 trait CompSciStudent: Programmer + Student {
     fn git_username(&self) -> String;
 }