DOC: show how to combine `ReactionInfo` objects (#243) #316

Job	Run time
style / Determine skipped pre-commit hooks	9s
pytest / Determine job matrix	9s
doc / linkcheck / Check external links	1m 25s
doc / nb / Execute and build documentation	2m 31s
style / Run local pre-commit hooks	1m 19s
style / Run taplo through pre-commit	21s
pytest / Run unit tests (3.10, ubuntu-22.04)	1m 43s
pytest / Run unit tests (3.11, ubuntu-22.04)	1m 26s
pytest / Run unit tests (3.7, ubuntu-22.04)	2m 5s
pytest / Run unit tests (3.9, ubuntu-22.04)	1m 57s
pytest / Run unit tests (3.6, ubuntu-20.04)	1m 55s
pytest / Run unit tests (3.8, ubuntu-22.04, qrules)	4m 45s
pytest / Run unit tests (3.9, macos-12)	1m 48s
style / Push changes	0s
doc / Upload to GitHub Pages	0s
	21m 33s

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