KOBAYASHI Shuji 732ef6b10e Support NODE_WORDS in mrb_parser_dump ...

#### Before this patch:

  ```terminal
  $ bin/mruby -v -e '%w[1]; %W[#{2}]'
  mruby 2.0.1 (2019-04-04)
  00001 NODE_SCOPE:
  00001   NODE_BEGIN:
  00001     node type: 86 (0x56)
  00001     node type: 86 (0x56)
  (snip)
  ```

#### After this patch:

  ```terminal
  $ bin/mruby -v -e '%w[1]; %W[#{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_WORDS:
  00001       NODE_STR "" len 0
  00001       NODE_BEGIN:
  00001         NODE_INT 2 base 10
  00001       NODE_STR "" len 0
  (snip)
  ```

2019-10-01 17:07:30 +09:00

..

codegen.c

Remove unused node type in codegen()

2019-09-28 15:15:31 +09:00

keywords

Remove unnecessary prototypes from 'keywords`; fix #4628

2019-08-12 18:22:31 +09:00

lex.def

Remove unnecessary prototypes from 'keywords`; fix #4628

2019-08-12 18:22:31 +09:00

node.h

Remove unused NODE_* constants from node.h.

2018-08-25 09:41:21 +09:00

parse.y

Support NODE_WORDS in mrb_parser_dump

2019-10-01 17:07:30 +09:00