Tim Peoples eb58983359 Add CalledAs method to cobra.Command (w/ tests) (#567) ...

* Add `CalledAs` method to Command (w/ tests)

The `CalledAs` method returns the name of the command or alias that
invoked the command -- as long as the command was actually invoked.
Otherwise, it returns the empty string.

The opens up possibilies for commands to behave differently based on
which alias invoked the command (in the same vein as Linux programs
which adjust their behavior based on the value of argv[0]).

* Fixed formatting

2018-02-04 08:58:53 -08:00

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