add diff support for 'calledWith*' matchers

[kuceb]

fix #124

allows:

spy('foo1')
spy('foo2')
expect(spy).calledWith('bar')
// actual: ['foo2']
// expected: ['bar']

expect(spy.firstCall).calledWith('bar')
// actual: ['foo1']
// expected: ['bar']

expect(neverCalledSpy).calledWith('bar')
// actual: undefined
// expected: ['bar']

tasks

• support calledOnceWith* matchers

[karthikbeam]

Tested, works well.

[eugenet8k]

Please merge, having diff printed is such a godsend

[sandinmyjoints]

Bump for review.

[lnfel]

This is nice

[robaca]

May I ask what's blocking this PR?

[robaca]

Ok, just tried it out by myself. It didn't solve the issue for me that IntelliJ doesn't show a nice diff view.

My current workaround: expect(....firstCall.args).to.deep.equal([...])

[eliasm307]

Also waiting on this PR as better sinon diff would greatly improve the testing experience