fragment-matcher generated code is wrongly indented

**Describe the bug**

When using the fragment-matcher plugin against a graphql server this is the result of the generated code.

**To Reproduce**
Steps to reproduce the behavior:
use fragment-matcher plugin. Possibly have not fragments to match.

1. My GraphQL schema:

```graphql
# Put your schema here
```

2. My GraphQL operations:

```graphql
# Put your operations here
```

3. My `codegen.yml` config file:

```yml
overwrite: true
schema: "http://localhost:3000/graphql"
documents: null
generates:
src/types/graphql-generated.ts:
plugins:
- "typescript"
- "fragment-matcher"
```