Starting from https://github.com/6to5/acorn-6to5/commit/40350cafb8d2c66cad7864e04792e9 046734c633 this shorthand also part of call expression
acorn-6to5
acorn-6to5 is not supported outside of 6to5 usage. Do not expect support if you use this in your own applications.
Deviates from acorn in the following ways:
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