Self-referencing guideline
`self-ref-validity`: Preventing duplicate self-referencing properties
While assigning values to self-referencing properties, avoid assigning the same
value to both the self-referencing property and the referred property.
For example: [`ftd.color`](/built-in-types/#ftd-color)
Not recommended
-- ftd.color my-color:
light: blue
dark: blue
Lang:
ftd
Recommended
-- ftd.color my-color:
light: blue
;; or
-- ftd.color my-color: blue
Lang:
ftd
