== String#methodize

  require 'facets/string/methodize'

module name

  a = "FooBase"
  r = "foo_base"
  a.methodize.assert == r

path name

  a = "foo/base"
  r = "foo__base"
  a.methodize.assert == r

name space

  a = "Foo::Base"
  r = "foo__base"
  a.methodize.assert == r

