Perform new array contraction pass by default.
Perform new array contraction pass by default.

Monotone-Parent: 325a019f42fb86f1cd57b71791cd0f3573552e36
Monotone-Revision: 2c44a7efbd06a91563a215f6f1be987f65c2ca4d

FrancisRussell/desola,FrancisRussell/desola,FrancisRussell/desola