[3.12] gh-70835: Clarify error message for CSV file opened with wrong newline (GH-113786) (GH-113905)

Based on patch by SilentGhost.
(cherry picked from commit 568d220993fa9b4b812ff1b425edd80dbe17dda9)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Miss Islington (bot) committed 2y ago

59a7b9495b64f0be8992564d30217137f0f0a662

Parent: 84677ff

Committed by GitHub <noreply@github.com> on 1/10/2024, 1:26:04 PM