<===> README.md
`@forward` should load modules in the same way as `@use`, and as such should
produce the same errors when loading fails. We assume that they use shared
infrastructure, though, and as such only duplicate a few basic load tests for
`@forward`.

<===>
================================================================================
<===> missing/input.scss
@forward "other";

<===> missing/error
Error: Can't find stylesheet to import.
  ,
1 | @forward "other";
  | ^^^^^^^^^^^^^^^^
  '
  input.scss 1:1  root stylesheet

<===>
================================================================================
<===> loop/forward_self/input.scss
@forward "input";

<===> loop/forward_self/error
Error: Module loop: this module is already being loaded.
  ,
1 | @forward "input";
  | ^^^^^^^^^^^^^^^^
  '
  input.scss 1:1  root stylesheet

<===>
================================================================================
<===> loop/forward_to_forward/input.scss
@forward "other";

<===> loop/forward_to_forward/other.scss
@forward "input";

<===> loop/forward_to_forward/error
Error: Module loop: this module is already being loaded.
  ,
1 | @forward "input";
  | ^^^^^^^^^^^^^^^^
  '
  other.scss 1:1  @forward
  input.scss 1:1  root stylesheet

<===>
================================================================================
<===> loop/forward_to_use/input.scss
@forward "other";

<===> loop/forward_to_use/other.scss
@use "input";

<===> loop/forward_to_use/error
Error: Module loop: this module is already being loaded.
  ,
1 | @use "input";
  | ^^^^^^^^^^^^
  '
  other.scss 1:1  @forward
  input.scss 1:1  root stylesheet

<===>
================================================================================
<===> loop/forward_to_import/input.scss
@forward "other";

<===> loop/forward_to_import/other.scss
@import "input";

<===> loop/forward_to_import/error
Error: This file is already being loaded.
  ,
1 | @import "input";
  |         ^^^^^^^
  '
  other.scss 1:9  @forward
  input.scss 1:1  root stylesheet