Changes in version 1.22.3:
The change to print the file name escaped when replaced into a shell command
has been reverted. (Reported by Sören Tempel).

When '--unsafe-names' is not specified, only the control characters \a, \b,
\t, \v, \f, \n, \r, \033, and \177 are now rejected in file names.

'make check' now checks file names with non-ASCII characters coded either in
ISO-8859-1 or in UTF-8.

'EXIT STATUS' now has its own section in the man page.

Changes in version 1.22.2:
Newline characters are no longer allowed in file names even if
'--unsafe-names' is specified.

The file name is now printed escaped also when replaced into a shell command.

Changes in version 1.22.1:

Ed now departs from POSIX and ignores SIGPIPE to prevent commands like
'w !:' or ',!:' from terminating ed. A broken pipe is now detected as any
other write error. (Reported by Sergei Trofimovich).

Changes in version 1.22:

The shell escape command (!) now accepts line addresses to filter the
addressed lines through a shell command. (ex(1) style filter).
(Suggested by Shawn Wagner, Andrew L. Moore, and John Cowan).
