nil was converted to "" and the matching regex would return [] and then be converted to nil with max usage.
Example exception:
```
NoMethodError (undefined method `<=' for nil:NilClass)
lib/text_sentinel.rb:71:in `seems_unpretentious?'
lib/validators/quality_title_validator.rb:13:in `validate_each'
lib/topic_creator.rb:25:in `valid?'
```
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