will -> must.

Muhtasim Ahsan · Muhtasim Ahsan · commit dafe6a71ed6e · 2015-07-04T14:30:14.000-05:00
diff --git a/Section 6 -- Execution.md b/Section 6 -- Execution.md
@@ -4,7 +4,7 @@ This section describes how GraphQL generates a response from a request.
 
 ## Evaluating requests
 
-To evaluate a request, the executor will have a parsed `Document` (as defined
+To evaluate a request, the executor must have a parsed `Document` (as defined
 in the “Query Language” part of this spec) and a selected operation name to
 run.
 
