Saneyaml load() and dump() does not preserve the same text

Consider the following example:
```
text = """

This is the apache license text.

"""

import saneyaml

data = {"text": text}
yaml_string = saneyaml.dump(data, indent=4)
loaded_yaml = saneyaml.load(yaml_string)
assert text == loaded_yaml["text"]
```

And this fails with:
```
---------------------------------------------------------------------------
AssertionError Traceback (most recent call last)
Cell In[5], line 1
----> 1 assert text == loaded_yaml["text"]

AssertionError:
```