 "{ t f \"42\" \"42\" 42 42 42 42.0 42.0 }"
  }
 { $heading "Output -- human readable" }
-  { $example "USING: yaml yaml.config ;"
+  { $unchecked-example "USING: yaml yaml.config ;"
 "t implicit-tags set
 t implicit-start set
 t implicit-end set

}
{ $examples
  { $heading "Input" }
  { $example "USING: prettyprint yaml ;"
"\"- true
- null
- ! 42

"See " { $url "http://yaml.org/type/merge.html" } $nl
"As per " { $url "http://sourceforge.net/p/yaml/mailman/message/12308050" }
", the merge key is implemented bottom up:" $nl
{ $unchecked-example "USING: yaml prettyprint ;
\"
foo: 1
<<:
