Validation Tool acts strange when max length is between 15 and 20

### Description
The Password Rules Validation Tool suggests passwords of non-max length when symbols are not allowed and when max length is between 15-19 and

### Replicate
1. Go to https://developer.apple.com/password-rules/
2. Use these rules:
```
required: lower;
required: upper;
required: digit;
```
3. Set min length to any (let's say 7)
4. Set max length to 15
5. Suggested passwords will be of length 12.
6. max length 15-19 will all have a length of 12 with these settings.

Start at the Password Rules Validation Tool URL and reproduce the case with the listed rules, a minimum of 7, and maximum lengths from 15 through 19. Trace the tool's password-generation entry point; done means suggested passwords respect each configured maximum length, including 15-19.

Written by the indexing model from the issue text.