"W. Lincoln Harvey" via "Bug reports for GUILE, GNU's Ubiquitous Extension Language" <bug-guile@gnu.org> writes:
> backup file, BSD sed’s -i option requires a zero-length string as a > mandatory argument, while Gnu sed’s -i option does not take any > argument. In cases like this, it is good to read the POSIX specs. However, you will find that -i is not specified at all. https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sed.html
