How to write namelist.input using fitch parameterisation

[shwetamukim]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Use compiler and version '....'
2. Use namelist options '....'
3. Output is '....'

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Attachments If applicable, attach supporting files: namelist.input, rsl.* files, etc.

Additional context Add any other context about the problem here, such as:

• This used to work with a previous version.
• The documentation is different from the exhibited behavior.