message: Fixup spacing docs
diff: @@ -11,6 +11,7 @@ import Button from 'src/Button'
  import Code from 'src/Code'
  import InputField from 'src/Input/InputField'
  import Table from 'src/Table'
  +import FieldSet from 'src/FieldSet';
  # Spacing
  @@ -74,10 +75,10 @@ The **8px major scale** is most commonly used for positional spacing. Like **hei
  ### Usage via CSS props
  <Playground>
  - <Block>
  + <FieldSet isHorizontal spacing="major-2">
  <InputField label="First name" />
  - <InputField label="Last name" marginLeft="major-1" />
  - </Block>
  + <InputField label="Last name" />
  + </FieldSet>
  <Button marginTop="major-2">Save</Button>
  </Playground>
  