ExUnit assert diff coloring false positive on non byte aligned binaries

[hissssst]

Elixir and Erlang/OTP versions

Erlang/OTP 27 [erts-15.2.7.6] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit:ns]
Elixir 1.19.5 (compiled with Erlang/OTP 27)

But I suspect it is present in master too

Operating system

linux

Current behavior

mix run the .exs file below

ExUnit.start()

defmodule Test do
  use ExUnit.Case

  test "_" do
    assert [<<1 :: size(1)>>, :x, 1] == [<<1 :: size(1)>>, :x]
  end
end

You will get an output which looks like this (but it is colored)

  1) test _ (Test)
     x.exs:6
     Assertion with == failed
     code:  assert [<<1::size(1)>>, :x, 1] == [<<1::size(1)>>, :x]
     left:  [<<1::size(1)>>, :x, 1]
     right: [<<1::size(1)>>, :x]
     stacktrace:
       x.exs:7: (test)

You can see that it colors <<1 :: size(1)>> as a thing which is different in both sides, while it is not.

Expected behavior

Only the last item of the output is colored red.

[SteffenDE]

I think this is a duplicate of #15191

[hissssst]

They are similar, but #15191 is about = and pattern matching, which is harder to implement. This one is about == and just incorrect handling of comparison somewhere in the diff-coloring code