#### Before this patch:

  ```terminal
  $ bin/mruby -v -e '%w[1 2]'
  mruby 2.0.1 (2019-04-04)
  00001 NODE_SCOPE:
  00001   NODE_BEGIN:
  00001     NODE_WORDS:
  00001       NODE_STR "1" len 1
  00001       node type: 85 (0x55)
  00001       NODE_STR "2" len 1
  (snip)
  ```

#### After this patch:

  ```terminal
  $ bin/mruby -v -e '%w[1 2]'
  mruby 2.0.1 (2019-04-04)
  00001 NODE_SCOPE:
  00001   NODE_BEGIN:
  00001     NODE_WORDS:
  00001       NODE_STR "1" len 1
  00001       NODE_LITERAL_DELIM
  00001       NODE_STR "2" len 1
  (snip)
  ```