Change ReadMe wording per PR review comment#20005

Merged

karalabe merged 3 commits intoethereum:masterfrom FlashSheridan:patch-1

Sep 10, 2019

+2-2

Commits on Aug 22, 2019

Accounts in alloc field must already exist
FlashSheridan
authored

Commits on Aug 23, 2019

Change wording per PR review comment
FlashSheridan
authored

Commits on Sep 10, 2019

README: minor fixups
karalabe
authored