Merge pull request #178 from git-sgmoore/patch-25

Minor typo

Author: JeremyRubin

docs/learn-sapio/src/ch08-03-concrete.md

@@ -19,7 +19,7 @@ struct GenericB<T:Compilable> {
 
 
 In `GenericA` we use a _trait object_ to allow us to let the `send_to` field
-equal any `Compilable` type while having having the same type `GenericA`,
+equal any `Compilable` type while having the same type `GenericA`,
 whereas `GenericB` takes a type parameter that makes the `GenericB` more
 specifically typed.
 
@@ -81,4 +81,4 @@ Thus a `Concrete` can be used in a Serialize/Deserialize/JsonSchema API bound
 context, whereas a `GenericA` could not.
 
 
-### TODO: Implement path for making this section easier!
+### TODO: Implement path for making this section easier!