consistent periods

Author: magicmark

spec/Section 3 -- Type System.md

@@ -2220,7 +2220,7 @@ SchemaCoordinate : Name
 1. Let {typeName} be the value of the first {Name}.
 2. Let {type} be the type in the {schema} named {typeName}.
 3. If {type} does not exist, return {void}.
-4. Return {type}
+4. Return {type}.
 
 SchemaCoordinate : Name . Name
 
@@ -2231,18 +2231,18 @@ SchemaCoordinate : Name . Name
 5. Let {enumValueName} be the value of the second {Name}.
 6. Let {enumValue} be the enum value of {type} named {enumValueName}.
 7. If {enumValue} does not exist, return {void}.
-8. Return {enumValue}
+8. Return {enumValue}.
 9. Otherwise if {type} is an Input Object type:
 10. Let {inputFieldName} be the value of the second {Name}.
 11. Let {inputField} be the input field of {type} named {inputFieldName}.
 12. If {inputField} does not exist, return {void}.
-13. Return {inputField}
+13. Return {inputField}.
 14. Otherwise:
 15. Assert {type} must be an Object or Interface type.
 16. Let {fieldName} be the value of the second {Name}.
 17. Let {field} be the field of {type} named {fieldName}.
 18. If {field} does not exist, return {void}.
-19. Return {field}
+19. Return {field}.
 
 SchemaCoordinate : Name . Name ( Name : )
 
@@ -2271,7 +2271,7 @@ SchemaCoordinate : @ Name ( Name : )
 2. Let {directive} be the directive in the {schema} named {directiveName}.
 3. Assert {directive} must exist.
 4. Let {directiveArgumentName} be the value of the second {Name}.
-5. Let {directiveArgument} be the argument of {directive} named
+5. Let {directiveArgument} be the argument of {directive} named.
    {directiveArgumentName}.
 6. If {directiveArgument} does not exist, return {void}.
 7. Return {directiveArgument}.