It points to places where Pug template is incorrect.
The following patterns are considered warnings:
pug`
each i in 1, 2, 3]
`
pug`
Component(
iam-object={ a: 1, b: 2
)
`
The following patterns are not considered warnings:
pug`p= variable`
pug`
Component(
object={a: 1, b: 2}
)
`
If you are not using Pug then you can disable this rule.