now it gets a diagnostic about 4096m being too large.
* pr: For compatibility (also more POSIX compliant): Include default
separator `TAB' when merging lines of full length.
-* tail -N file1 file2 works like head -N file1 file2, except when
- POSIXLY_CORRECT is set, in which case it gets an error.
+* When POSIXLY_CORRECT is not set, tail -N now accepts more than one file
+ argument (but warns that it's not portable), to be consistent with the
+ way head -N works, When POSIXLY_CORRECT is set using two or more file
+ arguments with the obsolescent form (-N) evokes an error. To avoid the
+ warning or failure, use the POSIX -n N option or the GNU --lines=N option.
Changes in release 1.22
[1.21a]