Remove trailing whitespace.
Use font-name, not font-face in deltagenerator
Remove extant sid param being passed to Delta.

This is a holdover from earlier tests; we must not have updated the
instantiation sites when we updated the interface for the Delta constructor.
Luckily they're harmless, but they're also pointless, so removing them.
Merge branch 'master' of https://github.com/stypi/tandem-core
Merge branch 'master' into cleanup