[arpitjain099]

FerryParser.parse_description wraps the description and then takes description_lines[0] unconditionally. textwrap.wrap returns an empty list for an empty or whitespace-only string, so a blank description raises IndexError instead of producing a help line.

It is reachable from normal startup. generate_endpoints passes data[method]["description"] straight into create_subparser, and set_arguments passes each param["description"] in too, so a single endpoint or parameter with an empty description aborts endpoint generation for the whole CLI.

I drove generate_endpoints against small local swagger files. A well-formed one builds its endpoint; an endpoint with "description": "" and a parameter with "description": " " both raised IndexError: list index out of range before this change and build fine after. The new tests fail on master and pass with the fix, and the rest of the suite is unchanged (the 4 test_api.py errors are a missing local htgettoken, either way).

FerryCLI.parse_description has the same unguarded indexing but no callers, so I left it out rather than widen this PR. Happy to include it if you would rather they matched.