Simplified didMount test.
Simplified didMount test.

substance/substance,podviaznikov/substance,DuncanAForbes/substance,GerHobbelt/substance,podviaznikov/substance,DuncanAForbes/substance,TypesetIO/substance,jacwright/substance,michael/substance-1,stencila/substance,GerHobbelt/substance,michael/substance-1,andene/substance,andene/substance,substance/substance,abhaga/substance,abhaga/substance,jacwright/substance,TypesetIO/substance