class Gem::NoAliasYAMLTree

def format_time time

This is ported over from the yaml_tree in 1.9.3 
def format_time time
  if time.utc?
    time.strftime("%Y-%m-%d %H:%M:%S.%9N Z")
  else
    time.strftime("%Y-%m-%d %H:%M:%S.%9N %:z")
  end
end

def register(target, obj)

Noop this out so there are no anchors 
def register(target, obj)
end

def visit_String(str) 

def visit_String(str)
  return super unless str == '=' # or whatever you want
  quote = Psych::Nodes::Scalar::SINGLE_QUOTED
  @emitter.scalar str, nil, nil, false, true, quote
end