1("[" @open "]" @close)
 2("{" @open "}" @close)
 3("\"" @open "\"" @close)
 4("do" @open "end" @close)
 5
 6(block_parameters "|" @open "|" @close)
 7(interpolation "#{" @open "}" @close)
 8
 9(if "if" @open "end" @close)
10(unless "unless" @open "end" @close)
11(begin "begin" @open "end" @close)
12(module "module" @open "end" @close)
13(_ . "def" @open "end" @close)
14(_ . "class" @open "end" @close)