Bug summary

When InEpsilonSlice takes a custom error message and the assertion fails, the custom message isn't displayed.

The issue is that in InEpsilonSlice implementation, msgAndArgs isn't passed to InEpsilon when iterating over slice elements:

It should be:

result := InEpsilon(t, actualSlice.Index(i).Interface(), expectedSlice.Index(i).Interface(), epsilon, msgAndArgs...)

To reproduce

Write any test where InEpsilonSlice fails and takes a custom message. The message wouldn't be displayed.