make `coalesce` handle only `missing`; add `something`#27258

Merged

ViralBShah merged 2 commits intomasterfrom jb/missingsomething

May 30, 2018

+223-185

Commits on May 28, 2018

make coalesce handle only missing; add something to handle nothing/Some

JeffBezanson
authored and
ViralBShah
committed
Move something docs with those for nothing and Some

nalimilan
authored and
ViralBShah
committed