class Tilt::ErubiTemplate

instead of the default (which is ::Erubi::Engine).
:engine_class

allows you to specify a custom engine class to use
to the options supported by the Erubi engine:
ErubiTemplate supports the following additional options, in addition
See github.com/jeremyevans/erubi<br>Erubi (a simplified version of Erubis) template implementation.

def precompiled_template(locals) 

def precompiled_template(locals)
  @src
end

def prepare 

def prepare
  @options.merge!(:preamble => false, :postamble => false, :ensure=>true)
  engine_class = @options[:engine_class] || Erubi::Engine
  @engine = engine_class.new(data, @options)
  @outvar = @engine.bufvar
  # Remove dup after tilt supports frozen source.
  @src = @engine.src.dup
  @engine
end