Upgrade some eslint whitespace warnings to errors (#4837)
Upgrade some eslint whitespace warnings to errors (#4837)

Otherwise people get random changes in their PRs when they run `tools/sigh lint --fix`
PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs