class Sass::Tree::IfNode

def to_src(tabs, opts, fmt, is_else = false)
  name =
    if !is_else; "if"
    elsif @expr; "else if"
    else; "else"
    end
  str = "#{'  ' * tabs}@#{name}"
  str << " #{@expr.to_sass(opts)}" if @expr
  str << children_to_src(tabs, opts, fmt)
  str << @else.send(:to_src, tabs, opts, fmt, true) if @else
  str
end