Three small fixes for save-analysis#43533

Merged

bors merged 4 commits intorust-lang:masterfrom

Aug 1, 2017

Commits on Jul 25, 2017

save-analysis: dedup macro references
Nick Cameron
committed

Commits on Jul 28, 2017

save-anlaysis: fix filter_generated
Nick Cameron
committed
format!: use a dummy span rather than callee span for the span base for temporary variables
Nick Cameron
committed

Commits on Aug 1, 2017

review changes
Nick Cameron
committed