Added information that verifying doubles have some limited usages with dynamically defined methods along with some advice on how to handle this.
This includes a link to the documentation that shows several ways on how this can be addressed and a link on how to disable verifying doubles if a simpler approach is necessary.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

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