U+ code now supports <code-hex>:<text> syntax so that multiple chars (a string)
may be specified as a fallback for non-UTF-8 terminals.
The U+<code>/<char> syntax was changed to U+<code>,<char>
New symbolic @-codes that send the right Unicode code point to UTF-8 terminals
or a string to others:
- ELLIPSIS
- COPYRIGHT
- SOUNDCOPY
- TRADEMARK
- DEGREE_C
- DEGREE_F