TL;DR: IPython moved display from IPython.core.display to IPython.display. Change the import, or upgrade spacy to a release that did.

## The error
```text
ImportError: cannot import name 'display' from 'IPython.core.display'
```

## Fix it
1. Replace the import:
   ```python
   from IPython.display import display
   ```
   Expected: no import error.
2. If the bad import is inside spacy's displacy, upgrade spacy instead:
   ```
   pip install -U spacy
   ```
   Expected: new release uses the new path.
3. Verify:
   ```
   python -c "from IPython.display import display; print('ok')"
   ```
   Expected: prints ok.

## When this applies
Use this when code does `from IPython.core.display import display` on modern IPython.

## When it does not apply
If the error names a different IPython.core member, look up its new location. If IPython itself will not import, reinstall it.

## Compatibility
Modern IPython (7+). IPython.display has re-exported display for years, so the new import works broadly.

## Root cause
IPython reorganized its display machinery and made IPython.display the public namespace; the old IPython.core.display path stopped exporting every name. Code importing from the old path breaks.

## Edge cases
HTML, Markdown, and SVG moved the same way; update all IPython.core.display imports in one pass. Libraries should import from IPython.display unconditionally now.