Go Matching error for chained function calls

[morgante]

This should match:

language go

`WithExec($x)`

func myFunc() {
  return t.Base(image).
        WithMountedFile("/sss/"+imageRef, ctr.AsTarball()).
        WithExec([]string{"some", "op"}).Stdout(ctx)
}

[morgante]

This isn't straightforward to solve with a context string, because the t.WithExec part is actually in the source separate from the args.

We probably need equivalence classes of some sort for this.