bug#28569: 25.2; dired-sort-toggle-or-edit vs. quote marks

[積丹尼 Dan Jacobson]

User sees arguments with embedded spaces on
(info "(coreutils) Formatting file timestamps")
and tries one.

He types C-u s which runs the command dired-sort-toggle-or-edit
and at the prompt gives:

ls switches (must contain -l): -olt --time-style='+%Y-%m-%d %H:%M:%S.%N %z'

Alas, it turns out if the string contains any kind of quote mark, the
entire dired screen will go blank, with the error

insert-directory: Listing directory failed but ‘access-file’ worked