move static lexer helper functions to lexical_feedback class * lex.ll, lex.h oct-parse.yy (do_comma_insert_check, text_yyinput, xunput, fixup_column_count, inside_any_object_index, is_keyword_token, is_variable, grab_block_comment, grab_comment_block, process_comment, next_token_is_sep_op, next_token_is_postfix_unary_op, next_token_is_bin_op, scan_for_comments, eat_whitespace, handle_number, have_continuation, have_ellipsis_continuation, eat_continuation, handle_string, next_token_is_assign_op, next_token_is_index_op, handle_close_bracket, maybe_unput_comma, next_token_can_follow_bin_op, looks_like_command_arg, handle_superclass_identifier, handle_meta_identifier, handle_identifier, maybe_warn_separator_insert, gripe_single_quote_string, gripe_matlab_incompatible, maybe_gripe_matlab_incompatible_comment, gripe_matlab_incompatible_continuation, gripe_matlab_incompatible_operator): Declare as members of lexical_feedback class. Change all callers.