Test QuickGV

See: https://graphviz.gitlab.io/_pages/pdf/dotguide.pdf

MMD

Cannot convert SVG by mmdc. (retval=1)
Shell command: '/usr/bin/mmdc' -q -i - -p '/var/www/html/extensions/QuickMMD/src/../config-puppeteer.json' -o '/var/www/html/images/quickmmd/Test_QuickGV-testmmd.svg'

testflow

test