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update README.md (#826)

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Fix the comment: consistent with others
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linzhaoming 2019-02-17 14:57:17 +08:00 • committed by umarcor
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README.md
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@ -389,7 +389,7 @@ The following validators are built in:
- `MinimumNArgs(int)` - the command will report an error if there are not at least N positional args.
- `MaximumNArgs(int)` - the command will report an error if there are more than N positional args.
- `ExactArgs(int)` - the command will report an error if there are not exactly N positional args.
- `ExactValidArgs(int)` = the command will report and error if there are not exactly N positional args OR if there are any positional args that are not in the `ValidArgs` field of `Command`
- `ExactValidArgs(int)` - the command will report an error if there are not exactly N positional args OR if there are any positional args that are not in the `ValidArgs` field of `Command`
- `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args.
An example of setting the custom validator: