Fix: command: do_help does not work as a 3rd level subcommand

[nicholasyang2022]

should pass the name of all ancestor levels to help_contextual.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.18%. Comparing base (c4ce88e) to head (541da04).
Report is 2 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
integration	55.20% <100.00%> (-0.01%)	⬇️
unit	52.72% <0.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
crmsh/command.py	62.36% <100.00%> (-0.14%)	⬇️

... and 2 files with indirect coverage changes

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