[3.8] bpo-36261: Improve example of the preamble field in email docs (GH-14751)#14760

Merged

miss-islington merged 1 commit intopython:3.8from

miss-islington:backport-8efade9-3.8

Jul 14, 2019

Commits on Jul 14, 2019

bpo-36261: Improve example of the preamble field in email docs (GH-14751)

carlbordum
authored and
miss-islington
committed