docs: def flatten_spec(spec, prefix,joiner=" :: "):
    """Flatten a canonical specification with nesting into one without nesting.
    When building unique names, concatenate the given prefix to the local test
    name without the "Test " tag."""
  
    if any(filter(operator.methodcaller("startswith","Test"),spec.keys())):
      flat_spec = {}
      for (k,v) in spec.items():
        flat_spec.update(flatten_spec(v,prefix + joiner + k[5:]))
      return flat_spec 
    else:
      return {"Test "+prefix: spec}