* c-lex.c (cb_def_pragma): Update.
	(c_lex): Update, and skip padding.
	* cppexp.c (lex, parse_defined): Update, remove unused variable.
	* cpphash.h (struct toklist): Delete.
	(union utoken): New.
	(struct cpp_context): Update.
	(struct cpp_reader): New members eof, avoid_paste.
	(_cpp_temp_token): New.
	* cppinit.c (cpp_create_reader): Update.
	* cpplex.c (_cpp_temp_token): New.
	(_cpp_lex_direct): Add PREV_WHITE when parsing args.
	(cpp_output_token): Don't print leading whitespace.
	(cpp_output_line): Update.
	* cpplib.c (glue_header_name, parse_include, get__Pragma_string,
	do_include_common, do_line, do_ident, do_pragma,
	do_pragma_dependency, _cpp_do__Pragma, parse_answer,
	parse_assertion): Update.
	(get_token_no_padding): New.
	* cpplib.h (CPP_PADDING): New.
	(AVOID_LPASTE): Delete.
	(struct cpp_token): New union member source.
	(cpp_get_token): Update.
	* cppmacro.c (macro_arg): Convert to use pointers to const tokens.
	(builtin_macro, paste_all_tokens, paste_tokens, funlike_invocation_p,
	replace_args, quote_string, stringify_arg, parse_arg, next_context,
	enter_macro_context, expand_arg, _cpp_pop_context, cpp_scan_nooutput,
	_cpp_backup_tokens, _cpp_create_definition): Update.
	(push_arg_context): Delete.
	(padding_token, push_token_context, push_ptoken_context): New.
	(make_string_token, make_number_token): Update, rename.
	(cpp_get_token): Update to handle tokens as pointers to const,
	and insert padding appropriately.
	* cppmain.c (struct printer): New member prev.
	(check_multiline_token): Constify.
	(do_preprocessing, cb_line_change): Update.
	(scan_translation_unit): Update to handle spacing.
	* scan-decls.c (get_a_token): New.
	(skip_to_closing_brace, scan_decls): Update.
	* fix-header.c (read_scan_file): Update.

	* doc/cpp.texi: Update.

	* gcc.dg/cpp/macro10.c: New test.
	* gcc.dg/cpp/strify3.c: New test.
	* gcc.dg/cpp/spacing1.c: Add tests.
	* gcc.dg/cpp/19990703-1.c: Remove bogus test.
	* gcc.dg/cpp/20000625-2.c: Fudge to pass.

From-SVN: r45793