MIR graphviz prettification#30602

Merged

bors merged 5 commits intorust-lang:masterfrom

solson:mir-graphviz-display

Jan 4, 2016

Commits on Dec 28, 2015

Commits on Dec 30, 2015

Commits on Jan 2, 2016

Add 'mut' to temporary vars in MIR graphviz output.
solson
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