extend compiletest to support revisions, incremental tests#32007

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bors merged 14 commits intorust-lang:masterfrom

nikomatsakis:compiletest-incremental

Mar 3, 2016

Commits on Mar 1, 2016

Commits on Mar 2, 2016

Commits on Mar 3, 2016

Do not assert revisions list is empty for pretty printing tests
nikomatsakis
committed
make pretty printer tests understand revisions, and make them ignore the
nikomatsakis
committed
mention caveat about should-fail in docs
nikomatsakis
committed