[3.7] bpo-33453: Handle string type annotations in dataclasses. (GH-6768)#6889

miss-islington merged 1 commit intopython:3.7python/cpython:3.7from

miss-islington:backport-2a7bacb-3.7miss-islington/cpython:backport-2a7bacb-3.7Copy head branch name to clipboard