TV writes files just the way they are present in the text buffer. No
interpretation of the contents occurs at all (*). This makes this editor
suitable even for simple patches to executable programs. After editing,
they remain executable!

Files are written with the same protection as the original file, with
the exception of the archive-bit (which is always OFF). That is, of
course, if the OS has an archive-bit to set.

Writing of the output-file(s) is never, under any operating system, a
completely safe operation. The following precautions are incorporated
to safeguard the data:
  - The TVback-backup file;
  - If an outputfile is not correctly written, and this is discovered by
    the operating system, the original file is restored.
  - If an outputfile is corrupted because of a system-crash or power-
    failure at an inopportune moment, the disk will probably be corrupt.
    However, after repair the original file will be available, under the
    name <original name>.TVB.


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(*) The only exception being under Windows, where 'binary'- and 'text'-
    files exist. The processing for both is entirely configurable.