General: Various fixes to the correctness of code and documentation r… #490

Job	Run time
Determine Matrix	0s
matrix.label	0s
${{ matrix.multisite && 'Multisite' \|\| 'Single Site' }} ${{ matrix.memcached && 'Memcached' \|\| 'Default' }}	0s
Failed workflow tasks	0s
Slack Notifications	0s
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