[3.12] gh-105915: Add 'r' prefix to not emit SyntaxWarning in test_fstring (GH-105940) (#105942)

(cherry picked from commit 4b431d2e90bf5760a57aa40af2dd78e7bbf0b1ae)

Co-authored-by: @sunmy2019
Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>

Miss Islington (bot) committed 2y ago

164fa930011c46d3261538c17f8c4ffbeedc0f7e

Parent: fea0d2f

Committed by GitHub <noreply@github.com> on 6/20/2023, 1:16:21 PM