Fix rendering of static methods.
Fix rendering of static methods.

Fixes #195

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