[daniel-nichter]

v1.2 is based on #68. It adds:

• Differ to allow concurrent diffs (i.e. no global/pkg vars that deep.Equal() uses)
• Inline testing (see WithInlineTesting) shown below

Original:

if diff := deep.Eqaul(a, b); diff != nil {
    t.Error(diff)
}

New:

d := deep.NewDiffer()
if diff := d.Equal(a, b); diff != nil {
    t.Error(diff)
}

But then I realized I could do something I've been doing recently in another project:

d := deep.Testing(t)
d.Equal(a, b)

After many years of that boilerplate, I'm happy to get rid of it cleanly with this new Differ design.

There's also Equalf for custom error message formatting.

[daniel-nichter]

@acorello Do you use Equal to compare two deltas? If not, I'll remove that part because once a feature exists, it can't be taken back and it has to be supported. But if you use it, I'll keep it.

I' m renaming stuff a bit that you can see in this PR.

[coveralls]

Coverage is 100.0% — v1.2 into main. No base build found for main.

[daniel-nichter]

After using v1.2 in a real project, the original "ergonomics" weren't smooth enough. E.g. I can't type deep.NewDiffer(deep.WithInlineTesting(deep.InlineTesting{T: t})), probably can't even remember that. But deep.Testing(t) I can. Then I really wanted single inline Equal in most cases, but found sometimes I have []testCase, so I needed Equalf, which is why Diff didn't work: Difff (3 "f"s). (I know Go test adds subtest names to output, but sometimes I don't use subtests and use a list of test cases structs instead.) But then with Equal and Equalf, Diff no longer served a purpose--why have a Diff that's not reported when Equal returns the Diff too? So I made diff private, leaving only Equal and Equalf. Since this comes full circle the original design of this pkg almost 10 years ago, I guess it was meant to be. It's easier to add than to change or remove, so if Diff or other methods or things are truly needed/requested by many, maybe they'll be added.