Change expected to expected_fh if it is a file handler

[atharva-2001]

expected_fh would clearly indicate that the variable holds a file handler. expected indicated data.

[Thakor-Yashpal]

"Can I work on this issue?"

[kevinzb56]

@atharva-2001 We can change expected to expected_fh in tardis.visualization.widgets.shell_info module.

[rudrakshnalbalwar]

Hi @atharva-2001 I wanted to confirm if the mentioned change needs to be applied across the entire codebase or only in specific sections/files. Could you please clarify? Thank you!