"a\ b" %I{a\ b} %Q{a\ b} %W{a\ b} %i{a\ b} %q{a\ b} %r{a\ b} %s{a\ b} %w{a\ b} %x{a\ b} %{a\ b} 'a\ b' /a\ b/ :"a\ b" :'a\ b' <<-"HERE" a\ b HERE <<-'HERE' a\ b HERE <<-`HERE` a\ b HERE `a\ b`