different string formatting are considered a difference even though they are equivalent

Hi,
Thanks for putting this extension together!

One thing I've noticed when comparing files is the following examples will be considered different, when they are in facts equivalent

```yaml
property: Foo
```

```yaml
property: |
  Foo
```

```yaml
property: >-
  Foo
```

```yaml
property: |-
  Foo
```

It'd be nice if it could be considered identical, or at least there was a setting for that.