Merge pull request #129 from bjornbytes/small-fixes

Grammar fixes and section adjustment

Author: leebyron

spec/Section 5 -- Validation.md

@@ -887,7 +887,7 @@ fragment ownerFragment on Dog {
 
 ** Formal Specification **
 
-  * For each {spread} (named or inline) in defined in the document.
+  * For each {spread} (named or inline) defined in the document.
   * Let {fragment} be the target of {spread}
   * Let {fragmentType} be the type condition of {fragment}
   * Let {parentType} be the type of the selection set containing {spread}
@@ -910,7 +910,7 @@ the parent type.
 
 ##### Object Spreads In Object Scope
 
-In the scope of a object type, the only valid object type
+In the scope of an object type, the only valid object type
 fragment spread is one that applies to the same type that
 is in scope.
 
@@ -1100,11 +1100,9 @@ For example the following query will not pass validation.
 GraphQL servers define what directives they support. For each
 usage of a directive, the directive must be available on that server.
 
-## Operations
-
-### Variables
+## Variables
 
-#### Variable Default Values Are Correctly Typed
+### Variable Default Values Are Correctly Typed
 
 ** Formal Specification **
 
@@ -1117,8 +1115,8 @@ usage of a directive, the directive must be available on that server.
 
 ** Explanatory Text **
 
-Variable defined by operations are allowed to define default values
-if the type of that variable not non-null.
+Variables defined by operations are allowed to define default values
+if the type of that variable is not non-null.
 
 For example the following query will pass validation.
 
@@ -1167,7 +1165,7 @@ query intToFloatQuery($floatVar: Float = 1) {
 }
 ```
 
-#### Variables Are Input Types
+### Variables Are Input Types
 
 ** Formal Specification **
 
@@ -1235,7 +1233,7 @@ query takesCatOrDog($catOrDog: CatOrDog) {
 }
 ```
 
-#### All Variable Uses Defined
+### All Variable Uses Defined
 
 ** Formal Specification **
 
@@ -1377,7 +1375,7 @@ This is because {housetrainedQueryTwoNotDefined} does not define
 a variable ${atOtherHomes} but that variable is used by {isHousetrainedFragment}
 which is included in that operation.
 
-#### All Variables Used
+### All Variables Used
 
 ** Formal Specification **
 
@@ -1459,7 +1457,7 @@ fragment isHousetrainedFragment on Dog {
 This document is not valid because {queryWithExtraVar} defines
 an extraneous variable.
 
-#### All Variable Usages are Allowed
+### All Variable Usages are Allowed
 
 ** Formal Specification **