A PHP array run through YAMLDump():
---
- Sequence item
The Key: Mapped value
- 
    - A sequence
    - of a sequence
- 
    first: A sequence
    second: of mapped values
Mapped: 
    - A sequence
    - which is mapped
A Note: What if your text is too long?
Another Note: >
    If that is the case, the dumper will probably fold your text
    by using a block.  Kinda like this.
The trick?: >
    The trick is that we overrode the default indent, 2, to 4
    and the default wordwrap, 40, to 60.
Old Dog: |
    And if you want
    to preserve line breaks,
    go ahead!
"key:withcolon": Should support this to