Better debugging message in EventEmitter.
Better debugging message in EventEmitter.

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