* The special characters ?, [, -, or *, can be matched using a set, eg. [*]
* Behaviour with malformed patterns is undefined, though generally reasonable.
*
- * Example patterns: "SD1?", "SD1[0-5]", "*R0", SD*1?[012]*xx"
+ * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
*
* This function uses one level of recursion per '*' in pattern.
* Since it calls _nothing_ else, and has _no_ explicit local variables,