Oneof -> OneOf

Author: benjie

spec/Section 3 -- Type System.md

@@ -1520,15 +1520,15 @@ define arguments or contain references to interfaces and unions, neither of
 which is appropriate for use as an input argument. For this reason, input
 objects have a separate type in the system.
 
-**Oneof Input Objects**
+**OneOf Input Objects**
 
-Oneof Input Objects are a special variant of Input Objects where the type system
+OneOf Input Objects are a special variant of Input Objects where the type system
 asserts that exactly one of the fields must be set and non-null, all others
 being omitted. This is useful for representing situations where an input may be
 one of many different options.
 
 When using the type system definition language, the `@oneOf` directive is used
-to indicate that an Input Object is a Oneof Input Object (and thus requires
+to indicate that an Input Object is a OneOf Input Object (and thus requires
 exactly one of its field be provided):
 
 ```graphql
@@ -1539,7 +1539,7 @@ input UserUniqueCondition @oneOf {
 }
 ```
 
-In schema introspection, the `__Type.oneOf` field will return {true} for Oneof
+In schema introspection, the `__Type.oneOf` field will return {true} for OneOf
 Input Objects, and {false} for all other Input Objects.
 
 **Circular References**
@@ -1635,7 +1635,7 @@ is constructed with the following rules:
   does not provide a default value, the input object field definition's default
   value should be used.
 
-Further, if the input object is a Oneof Input Object, the following additional
+Further, if the input object is a OneOf Input Object, the following additional
 rules apply:
 
 - If the input object literal or unordered map does not contain exactly one
@@ -1720,7 +1720,7 @@ input ExampleInputTagged @oneOf {
       {"\_\_"} (two underscores).
    3. The input field must accept a type where {IsInputType(inputFieldType)}
       returns {true}.
-   4. If the Input Object is a Oneof Input Object then:
+   4. If the Input Object is a OneOf Input Object then:
       1. The type of the input field must be nullable.
       2. The input field must not have a default value.
 3. If an Input Object references itself either directly or through referenced
@@ -1750,7 +1750,7 @@ defined.
    the original Input Object.
 4. Any non-repeatable directives provided must not already apply to the original
    Input Object type.
-5. If the original Input Object is a Oneof Input Object then:
+5. If the original Input Object is a OneOf Input Object then:
    1. All fields of the Input Object type extension must be nullable.
    2. All fields of the Input Object type extension must not have default
       values.
@@ -1974,7 +1974,7 @@ GraphQL implementations that support the type system definition language should
 provide the `@specifiedBy` directive if representing custom scalar definitions.
 
 GraphQL implementations that support the type system definition language should
-provide the `@oneOf` directive if representing Oneof Input Objects.
+provide the `@oneOf` directive if representing OneOf Input Objects.
 
 When representing a GraphQL schema using the type system definition language any
 _built-in directive_ may be omitted for brevity.
@@ -2171,7 +2171,7 @@ directive @oneOf on INPUT_OBJECT
 ```
 
 The `@oneOf` directive is used within the type system definition language to
-indicate an Input Object is a Oneof Input Object.
+indicate an Input Object is a OneOf Input Object.
 
 ```graphql example
 input UserUniqueCondition @oneOf {

spec/Section 4 -- Introspection.md

@@ -369,7 +369,7 @@ Fields\:
 - `name` must return a String.
 - `description` may return a String or {null}.
 - `inputFields` must return the set of input fields as a list of `__InputValue`.
-- `oneOf` must return {true} when representing a Oneof Input Object, {false}
+- `oneOf` must return {true} when representing a OneOf Input Object, {false}
   otherwise.
 - All other fields must return {null}.
 

spec/Section 5 -- Validation.md

@@ -1427,12 +1427,12 @@ arguments, an input object may have required fields. An input field is required
 if it has a non-null type and does not have a default value. Otherwise, the
 input object field is optional.
 
-### Oneof Input Objects Have Exactly One Field
+### OneOf Input Objects Have Exactly One Field
 
 **Formal Specification**
 
 - For each {operation} in {document}:
-  - Let {oneofInputObjects} be all Oneof Input Objects transitively included in
+  - Let {oneofInputObjects} be all OneOf Input Objects transitively included in
     the {operation}.
   - For each {oneofInputObject} in {oneofInputObjects}:
     - Let {fields} be the fields provided by {oneofInputObject}.
@@ -1449,10 +1449,10 @@ input object field is optional.
 
 **Explanatory Text**
 
-Oneof Input Objects require that exactly one field must be supplied and that
+OneOf Input Objects require that exactly one field must be supplied and that
 field must not be {null}.
 
-An empty Oneof Input Object is invalid.
+An empty OneOf Input Object is invalid.
 
 ```graphql counter-example
 mutation addPet {
@@ -1488,7 +1488,7 @@ mutation addPet {
 }
 ```
 
-Variables used for Oneof Input Object fields must be non-nullable.
+Variables used for OneOf Input Object fields must be non-nullable.
 
 ```graphql example
 mutation addPet($cat: CatInput!) {