bug: asdf cannot resolve config paths with whitespace in them

From original issue with more context: https://github.com/asdf-vm/asdf-ruby/issues/270

If `$ASDF_DATA_DIR` is set to a path with whitespace in it, the asdf-nodejs plugin cannot do the business:

```bash
$ echo $ASDF_DATA_DIR
/Users/user/Library/Application Support/asdf

$ node
bash: /Users/user/Library/Application: No such file or directory
bash: get_preset_version_for: command not found
No version is set for command node
Consider adding one of the following versions in your config file at
nodejs 18.18.2
```