fix spaces

Author: robrichard

spec/Section 6 -- Execution.md

@@ -560,7 +560,7 @@ CollectFields(objectType, objectValue, selectionSet, variableValues, deferredFra
           {responseKey}; if no such list exists, create it as an empty list.
         * Append all items in {fragmentGroup} to {groupForResponseKey}.
   * Return {groupedFields}.
-  
+
 Note: The steps in {CollectFields()} evaluating the `@skip` and `@include`
 directives may be applied in either order since they apply commutatively.
 
@@ -572,7 +572,7 @@ DoesFragmentTypeApply(objectType, fragmentType):
     * if {objectType} is an implementation of {fragmentType}, return {true} otherwise return {false}.
   * If {fragmentType} is a Union:
     * if {objectType} is a possible type of {fragmentType}, return {true} otherwise return {false}.
- 
+
 DeferFragment(objectType, objectValue, fragmentSelectionSet, parentPath):
   * Let {label} be the value or the variable to {deferDirective}'s {label} argument.
   * Let {deferredFragmentRecord} be the result of calling {CreateDeferredFragmentRecord(label, objectType, objectValue, fragmentSelectionSet, parentPath)}.