Fix shift/reduce conflicts introduced in the last few commits
Make Racc warnings output in bold red text so that they don't go unnoticed in the rake task output stream
Add more two-term operators
Make ';' a @bstack-dependent rule in lexer
Rename T_COMMA to T_ARG_SEP and T_CONST_SEP
Make commas optional on multiline array and argument literals
Refactor out bind_begin and binl_begin machine definitions with new pre_bind scanner
Consolidate param_list machine definition into bind_body scanner in lexer
Add optional comma support to parameter list parsing