formatting and spelling. Spec is American, not British 😄

Author: martinbonnin

spec/Appendix C -- Built-in Definitions.md

@@ -69,11 +69,11 @@ directive @deprecated(
 ) on FIELD_DEFINITION | ARGUMENT_DEFINITION | ENUM_VALUE | INPUT_FIELD_DEFINITION
 
 """
-Exposes a URL that specifies the behaviour of this scalar.
+Exposes a URL that specifies the behavior of this scalar.
 """
 directive @specifiedBy(
   """
-  The URL that specifies the behaviour of this scalar.
+  The URL that specifies the behavior of this scalar.
   """
   url: String!
 ) on SCALAR

spec/Section 3 -- Type System.md

@@ -388,9 +388,10 @@ Scalar types represent primitive leaf values in a GraphQL type system. GraphQL
 responses take the form of a hierarchical tree; the leaves of this tree are
 typically GraphQL Scalar types (but may also be Enum types or {null} values).
 
-GraphQL provides a number of [built-in scalars](#sec-Appendix-Built-in-Definitions.Scalars)
-which are fully defined in the sections below, however type systems may also add
-additional custom scalars to introduce additional semantic meaning.
+GraphQL provides a number of
+[built-in scalars](#sec-Appendix-Built-in-Definitions.Scalars) which are fully
+defined in the sections below, however type systems may also add additional
+custom scalars to introduce additional semantic meaning.
 
 **Built-in Scalars**
 
@@ -1950,11 +1951,12 @@ GraphQL implementations that support the type system definition language should
 provide the `@specifiedBy` directive if representing custom scalar definitions.
 
 When representing a GraphQL schema using the type system definition language any
-[built-in directive](#sec-Appendix-Built-in-Definitions.Directives) may be omitted for brevity.
+[built-in directive](#sec-Appendix-Built-in-Definitions.Directives) may be
+omitted for brevity.
 
 When introspecting a GraphQL service all provided directives, including any
-[built-in directive](#sec-Appendix-Built-in-Definitions.Directives), must be included in the set of
-returned directives.
+[built-in directive](#sec-Appendix-Built-in-Definitions.Directives), must be
+included in the set of returned directives.
 
 **Custom Directives**
 

spec/Section 4 -- Introspection.md

@@ -121,7 +121,8 @@ warnings.
 
 The schema introspection system is itself represented as a GraphQL schema.
 
-See [Appendix C](#sec-Introspection-types) for more details about the schema type definitions.
+See [Appendix C](#sec-Introspection-types) for more details about the schema
+type definitions.
 
 ### The \_\_Schema Type