parse_env_cfg updates cfg.env_spacing instead of cfg.scene.env_spacing

In the GeneratedTaskEnvCfg class, the following variables are set:

self.num_envs: int = num_envs
self.env_spacing: float = env_spacing
...

# Set task-specific configs
self.scene = scene_env_cfg(num_envs=num_envs, env_spacing=env_spacing)

See: https://github.com/NVlabs/RoboLab/blob/ad45d4f974725d020f82c2b0d77d78533aeba2b3/robolab/core/environments/config.py#L210.

However, in parse_env_cfg, the cfg.scene.num_envs is updated, but not cfg.scene.env_spacing:

if env_spacing is not None:
    cfg.env_spacing = env_spacing

...
# number of environments
if num_envs is not None:
    cfg.scene.num_envs = num_envs
    cfg.num_envs = num_envs

See: https://github.com/NVlabs/RoboLab/blob/ad45d4f974725d020f82c2b0d77d78533aeba2b3/robolab/core/environments/config.py#L374.

This means that the env_spacing override is not correctly propagated to Isaac Lab.

Start in robolab/core/environments/config.py at GeneratedTaskEnvCfg and parse_env_cfg, using the linked lines as the entry points. Trace how env_spacing is stored during parsing and compare it with the existing num_envs propagation. Done means an env_spacing override reaches cfg.scene.env_spacing and is correctly propagated to Isaac Lab.