port open Dgraph Docs PRs (#116)

Co-authored-by: Jordan <[email protected]>
Co-authored-by: Matthew McNeely <[email protected]>

Author: 3 people

dgraph/dql/schema.mdx

@@ -79,7 +79,7 @@ notation):
   set {
     <_:jedi1> <character_name> "Luke Skywalker" .
     <_:leia> <character_name> "Leia" .
-    <_:sith1> <character_name> "Anakin" (aka="Darth Vador",villain=true).
+    <_:sith1> <character_name> "Anakin" (aka="Darth Vader",villain=true).
     <_:sith1> <has_for_child> <_:jedi1> .
     <_:sith1> <has_for_child> <_:leia> .
   }

dgraph/graphql/http.mdx

@@ -565,6 +565,9 @@ trace information for the request.
 - `"tracing"`: Displays performance tracing data in [Apollo
   Tracing][apollo-tracing] format. This includes the duration of the whole query
   and the duration of each operation.
+- `"dql_query"`: Optional, displays the translated DQL query Dgraph composed.
+  This is only output when the GraphQL debug superflag
+  `(--graphql "debug=true;")` is set.
 
 [apollo-tracing]: https://github.com/apollographql/apollo-tracing