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$ cargo free thanks-cli thanks
thanks-cli: Available
thanks    : Available 

The second colon has come directly after the crate name.

Subcommand free gets interpreted as a crate name, therefore two lines are printed each time the tool is used. The second line is the one we are interested in.

If a name is taken, a list of similar names could be checked to give a user a list of potential alternative crate names.

Passing n names currently does currently n requests one after another. An optional feature for concurrency could make the tool run faster when multiple names are supplied.

In the case that multiple names are provided, print out the name alongside the availability for easier traceability.