finds and prints strings containing 6 or more
consecutive printable UTF-encoded characters
in a (typically) binary file, default
Printable characters are taken to be
characters from blank through tilde (hexadecimal 20 through 7E), inclusive,
all other characters from value 00A0 to FFFF.
the decimal offset within the file at which the string starts and the text
of the string. If the string is longer than 70 runes the line is
terminated by three dots and the printing is resumed on the next
line with the offset of the continuation line.