Document updates (fixes?) to (calls|resolves|returns|throws)Arg

[fearphage]

In 6.1.2, the way calls to callsarg, resolvesArg, returnsArg, and throwsArg handled not enough parameters changed/were fixed (via #1848).

Example

const stub = sinon.stub().returnsArg(5);
const result = stub('not', 'enough', 'args');  // the outcome of this line changed

Previously result would be set to undefined since there is no argument at the 5th index. At 6.1.2, this functionality changed into a TypeError being thrown since there aren't enough arguments to satisfy the request. Keep in mind that callsArg would have always thrown a TypeError here since undefined is not a function. However the error message changed to match the others.

These changes should be documented.

Note: resolvesArg was added in 6.1.1 and always functioned this way. It didn't change like the others, but it also needs to be documented.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[fearphage]

This was fixed in #1860 .

[fearphage]

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