Change scoped field slots name syntax

[mehran-prs]

Due to new Dynamic Arguments feature of Vue when we want to define new field slot in table, should add two \ to field name :
e.g

<template #\[field_name\]="row">Some thing...</template>

I think field slots name syntax can be better, something like __field_name or _field_name_.

[tmorehouse]

See #3862

[tmorehouse]

Note that \ are not allowed in attribute names.

[mehran-prs]

See #3862

Yes, after seeing this issue, I closed my issue.

[mehran-prs]

Note that \ are not allowed in attribute names.

You got it wrong, I don't using \ as attribute name, just escaping [ & ] in attribute name and Vue allow this.

[tmorehouse]

When used in document DOM templates there can be issues with \. But not when using Vue-loader