Inadvertently reintroduced in f9f1236. It was just the conditional
that was bad: due to resolving the possible buffer underflow when
comparing to "muskox", the pluralizer now only adds -es when the length
of the string is greater than 5. So for "box" and "fox" the pluralizer
will never add the -es ending, since they are greater than 5.
This commit checks for "does not end in muskox" correctly.
copperwater