# Description

When configclass dicts are nested inside lists, the list is treated as
an Iterable object and assigned directly to the outer configclass when
updating configclass data with dicts. This overwrites the configclass
object in the list with a dict object and causes undesired behavior.

This change checks for nested dictionaries inside Iterables and updates
the values inside the dictionary individually without overwiting the
full Iterable.

Fixes https://github.com/isaac-sim/IsaacLab/issues/843

## Type of change

- Bug fix (non-breaking change which fixes an issue)


## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there