Ruby

Specify LAST_NODE for NODE_DEFINED

For example:

defined?(1)

Before:

# @ NODE_SCOPE (id: 2, line: 1, location: (1,0)-(1,11))
# +- nd_tbl: (empty)
# +- nd_args:
# |   (null node)
# +- nd_body:
#     @ NODE_DEFINED (id: 1, line: 1, location: (1,0)-(1,11))*
#     +- nd_head:
#     |   @ NODE_INTEGER (id: 0, line: 1, location: (1,9)-(1,10))
#     |   +- val: 1

After:

# @ NODE_SCOPE (id: 2, line: 1, location: (1,0)-(1,11))
# +- nd_tbl: (empty)
# +- nd_args:
# |   (null node)
# +- nd_body:
#     @ NODE_DEFINED (id: 1, line: 1, location: (1,0)-(1,11))*
#     +- nd_head:
#         @ NODE_INTEGER (id: 0, line: 1, location: (1,9)-(1,10))
#         +- val: 1