Clarify the instructions for length zero arrays.
@@ -14,4 +14,4 @@ For want of a battle the kingdom was lost.
And all for the want of a nail.
```
-Note that the list of inputs may vary; your solution should be able to handle lists of arbitrary length and content. No line of the output text should be a static, unchanging string; all should vary according to the input given.
+Note that the list of inputs may vary; your solution should be able to handle lists of arbitrary length (including zero elements, generating empty output) and content. No line of the output text should be a static, unchanging string; all should vary according to the input given.
