Fix epytext syntax issues 2021Q2

[twisted-trac]

	@twm reported
Trac ID	trac#10239
Type	defect
Created	2021-07-26 06:32:32Z
Branch	https://github.com/twisted/twisted/tree/10239-epytext-again

Nobody runs tox -e apidocs so it's broken. Here we go again...

Searchable metadata

trac-id__10239 10239
type__defect defect
reporter__twm twm
priority__normal normal
milestone__None None
branch__10239_epytext_again 10239-epytext-again
branch_author__ 
status__closed closed
resolution__fixed fixed
component__core core
keywords__None None
time__1627281152935311 1627281152935311
changetime__1627446350948629 1627446350948629
version__None None
owner__None None

[twisted-trac]

	@twm set owner to @twm @twm set status to assigned

[twisted-trac]

	@twm removed owner @twm set status to new

PR: #1641

Someday I'll figure out how to make these issues break the build so they don't happen in the first place.

[twisted-trac]

	@twm set status to closed

Thomas and Adi reviewed on GitHub: #1641 (comment)

This has been merged: 1f7924f