ConvertToInclude autocorrection breaks the code if snippet uses variables defined in parent context

[charlespwd]

The ConvertIncludeToRender autocorrector doesn't correct properly if the snippet assumes a variable was defined in its parent context.

Example:

// templates/product.liquid
{% assign x = "hello world" %}
{% include 'echo-x' %}

// snippets/echo-x.liquid
{{ x }}

// rendered content
hello world

The autocorrector would flip that to this:

// templates/product.liquid
{% assign x = "hello world" %}
{% render 'echo-x' %}

// snippets/echo-x.liquid
{{ x }}

// rendered content
Undefined Variable 'x'

What it should do instead:

{% render "echo-x", x: x %}

Proposed solution / thoughts

1. Gather all the UndefinedAssigns in the snippet that the include refers.
2. Pass those as arguments to the render when correcting.

Note:

I feel like we should disable this autocorrection until this is fixed. Breaking a site on first autocorrect doesn't seem like the way to go.