don't convert "end" token to "__end__" for indexing * lex.ll (octave_base_lexer::handle_identifier): Don't translate "end" to "__end__". * pt-arg-list.cc (Fend): Rename from F__end__. * pt-id.h (tree_identifier::has_magic_end): Recognize "end" instead of "__end__". * pt-idx.cc: Refer to "end" in comment instead of "__end__". * variables.cc (symbol_exist): Return early if keyword is found. * resource-manager.cc (resource_manager::octave_keywords): Delete __end__ from the list.