`gen` feature does not allow any positive integers as per user guide

[nus-se-script]

In user guide, MAXIMUM_DIGITS can be any positive integer.

In program, 1000000000000 is not accepted even though it is a valid positive integer.

Perhaps you can specify the exact range of numbers that can be accepted

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_{[original: nus-cs2113-AY2324S2/pe-interim#2446] [original labels: severity.Low type.DocumentationBug]}

[Andy123qq4]

Team's Response

No details provided by team.

Duplicate status (if any):

Duplicate of #1826