* tr 'a[b*512]' '[a*]' < /dev/null terminates
* tr '[:*3][:digit:]' 'a-m' and tr 'a[=*2][=c=]' 'xyyz' no longer fail
* special characters in tr's string1 and string2 may be escaped with backslash
+
User-visible changes in release 1.13
* md5sum: with --check, distinguish between open/read failure and bad checksum
* md5sum: remove -h, -s, -v short options
* sort accepts -.1 +.2 options for compatibility
* od works properly when dump limit is specified and is a multiple of
bytes_per_block (set by --width, 16 by default).
+
User-visible changes in release 1.12
* sort no longer reports spurious errors on Ultrix systems
* new program: md5sum