* parse.y, node.h, compile.c: change node tree structure. a purpose
of this change is to unify argument structure of method and block.
this change prohibits duplicate block parameter name.
new argument infromation:
NODE_ARGS [m: int, o: NODE_OPT_ARG, ->]
NODE_ARGS_AUX [r: ID, b: ID, ->]
NODE_ARGS_AUX [Pst: id, Plen: int, init: NODE*]
optarg information:
NODE_OPT_ARGS [idx, expr, ->]
* vm_macro.def: ditto.
* gc.c: ditto.
* iseq.c: ditto.
* compile.h: fix debug function name.
* test/ripper/test_scanner_events.rb: |_,_,foo| -> |_1,_2,foo|
* test/ruby/test_lambda.rb: disalbe test temporarily.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11840 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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