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

"
  }
{ $heading "Output -- verbose" }
  { $example "USING: yaml yaml.config ;"
"f implicit-tags set
f implicit-start set
f implicit-end set

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