docs: The docstring summary is sometimes not separated from attributes, args, examples, ...

[jloehel]

I am seeing some difficulties to render some docstrings with sphinx autodoc with the napoleon ext. In example the docstring from:

cve-bin-tool/cve_bin_tool/cve_scanner.py

Lines 66 to 69 in e36aabe

	"""Get CVEs against a specific version of a product.
	Example:
	nvd.get_cves('haxx', 'curl', '7.34.0')
	"""

It gets rendered to:

The example gets not rendered correctly because there is no blank line between the summary and the example. If I add it, it gets rendered correctly.