`AssertionError`s with differing items in dict of lists do not display properly when not running in verbose mode

[DetachHead]

• [X] a detailed description of the bug or problem you are having when an assert statement fails where the values being compared are dicts of lists with 8 or more items in the list, it does not show what part of the list was different in the output.
• [ ] output of pip list from the virtual environment you are using not using pip
• [X] pytest and operating system versions py pytest 8.0, windows 10/11
• [X] minimal example if possible

def test_something():
    value1 = {"asdf": [1, 1, 1, 1, 1, 1, 1, 1]}
    value2 = {"asdf": [1, 1, 1, 1, 1, 1, 1, 2]}
    assert value1 == value2

AssertionError: assert {'asdf': [1, ...1, 1, 1, ...]} == {'asdf': [1, ...1, 1, 1, ...]}
  
  Differing items:
  {'asdf': [1, 1, 1, 1, 1, 1, ...]} != {'asdf': [1, 1, 1, 1, 1, 1, ...]}
  Use -v to get more diff

the truncated diff does not show what part was different. it should instead display something like:

  Differing items:
  {'asdf': [1, 1, 1, ...1, 1]} != {'asdf': [1, 1, 1, ...1, 2]}

[mberkowitz03]

Hi, planning to work on this soon!

[reaganjlee]

Would it make sense to update the existing message-style of sequences, or is the original example preferred? I'm imagining the following

  Differing items:
  {'asdf': At index 0 diff: 1 != 2}

  Differing items:
  {'asdf': Right contains 2 more items, first extra item: 3}

[DetachHead]

i'm not sure what the best way to do it is. providing a good message for assertion errors that account for possible data structure seems like an impossible task. though i'm probably leaning towards the existing style as it gives more info/context