When COMMAND.COM reloading fails it should be made clear that pressing a key will retry

[mateuszviste]

suggested by Bernd in #121

[mateuszviste]

should be clearer now.

there is one space too much trailing the A:\COMMAND.COM string - not sure yet where this comes from, to be investigated.

[mateuszviste]

there is one space too much trailing the A:\COMMAND.COM string - not sure yet where this comes from, to be investigated.

fixed