| Case Ranges

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You can specify a range of consecutive values in a single `case` label, like this:

    case low ... high:

This has the same effect as the proper number of individual `case` labels, one for each integer value from low to high, inclusive.
This feature is especially useful for ranges of ASCII character codes:

    case 'A' ... 'Z':

Note: Always write spaces around the `...`, for otherwise it may be parsed wrong when you use it with integer values. For example, write this:

    case 1 ... 5:

rather than this:

    case 1...5: