Signature symbols in this unit

Symbol	Specification	Kind	Type
. '	string-append	f	char → string
. + .	string-data	f	char × string → string
. + .	string-append	f	string × string → string
. .char1	string-data	f	string → char
. .rstring	string-data	f	string → string
char	char	s
char	char	v	char
char0	char	v	char
char1	char	v	char
char2	char	v	char
str	string-data	v	string
str0	string-data	v	string
str1	string-data	v	string
str2	string-data	v	string
str3	string-data	v	string
string	string-data	s
stringvar	string-append	v	string
stringvar0	string-append	v	string