Fix python-info-docstring-p

* lisp/progmodes/python.el (python-info-docstring-p): Stop using
python-rx string-delimiter.

* test/lisp/progmodes/python-tests.el
(python-font-lock-escape-sequence-bytes-newline)
(python-font-lock-escape-sequence-hex-octal)
(python-font-lock-escape-sequence-unicode)
(python-font-lock-raw-escape-sequence): Mark as expected failures
until another bug in 'python-info-docstring-p' is corrected.
(python-info-docstring-p-7): New test.  (Bug#63622)

1 files changed, 2 insertions, 5 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 6fc05b246a6..032a17c52ff 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -6018,8 +6018,7 @@ point's current `syntax-ppss'."
     (let ((counter 1)
           (indentation (current-indentation))
           (backward-sexp-point)
-          (re (concat "[uU]?[rR]?"
-                      (python-rx string-delimiter))))
+          (re "[uU]?[rR]?[\"']"))
       (when (and
              (not (python-info-assignment-statement-p))
              (looking-at-p re)
@@ -6040,9 +6039,7 @@ point's current `syntax-ppss'."
                                                     backward-sexp-point))
                                      (setq last-backward-sexp-point
                                            backward-sexp-point))
-                                   (looking-at-p
-                                    (concat "[uU]?[rR]?"
-                                            (python-rx string-delimiter))))))
+                                   (looking-at-p re))))
                   ;; Previous sexp was a string, restore point.
                   (goto-char backward-sexp-point)
                   (cl-incf counter))