relative_path_from

# File lib/rubygems/request_set/lockfile.rb, line 138
  def relative_path_from dest, base # :nodoc:
    dest = File.expand_path(dest)
    base = File.expand_path(base)

    if dest.index(base) == 0
      return dest[base.size+1..-1]
    else
      dest
    end
  end