Fix a few minor formatting issues in documentation #826

Job	Run time
Determine Python versions	5s
Run linters with pre-commit	1m 1s
Test building the documentation	1m 39s
Python 3.12 on ubuntu-20.04 (standalone: false, 32bit: false)	27m 13s
Python 3.12 on ubuntu-20.04 (standalone: false, 32bit: true)	26m 52s
Python 3.12 on ubuntu-20.04 (standalone: true, 32bit: false)	21m 39s
Python 3.12 on ubuntu-20.04 (standalone: true, 32bit: true)	21m 45s
Python 3.12 on windows-2019 (standalone: false, 32bit: false)	1h 10m 33s
Python 3.12 on windows-2019 (standalone: false, 32bit: true)	1h 10m 50s
Python 3.12 on windows-2019 (standalone: true, 32bit: false)	26m 18s
Python 3.12 on windows-2019 (standalone: true, 32bit: true)	24m 41s
Python 3.12 on macOS-11 (standalone: false, 32bit: false)	50m 24s
Python 3.12 on macOS-11 (standalone: false, 32bit: true)	47m 1s
Python 3.12 on macOS-11 (standalone: true, 32bit: false)	35m 52s
Python 3.12 on macOS-11 (standalone: true, 32bit: true)	29m 15s
Python 3.9 on ubuntu-20.04 (standalone: false, 32bit: false)	23m 45s
Python 3.9 on ubuntu-20.04 (standalone: true, 32bit: false)	20m 45s
Indicate completion to coveralls.io	14s
	8h 19m 52s

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