This helps to be consistent with using quotes across the codebase.
Basically it requires double quotes for basic strings, and single quotes for javascript.
The following patterns are considered warnings:
pug`div= "Hello"`
pug`div(data-text='Hello')`
The following patterns are not considered warnings:
pug`div= 'Hello'`
pug`div(data-text="Hello")`
If you are not using Pug then you can disable this rule.