---
- name: Plain Scalar looking like key, comment, anchor and tag
  from: http:192.168.11.128 via @ingydotnet
  tags: scalar
  yaml: |
    ---
    k:#foo
     &a !t s
  tree: |
    +STR
     +DOC ---
      =VAL :k:#foo &a !t s
     -DOC
    -STR
  json: |
    "k:#foo &a !t s"
  dump: |
    --- k:#foo &a !t s