Changes dealing with encoded files:

Changes dealing with encoded files:

1. Appending to an encoded file works by reading the file into a
   temporary buffer, appending the text, and writing it back out.

2. Line translation is handled for encoded files the same way it is
   for unencoded files.

3. Doing I/O to non-encoded files, if the file doesn't exist, an
   encoded file is used in its place if available.