Fix off by one error in python-mode assertion (Bug#30964)

* lisp/progmodes/python.el (python-nav-end-of-statement): Don't assert
that string-start is strictly greater than last-string-end, because
the string end is a position outside of the string and may therefore
be the same as the following string's start.
* test/lisp/progmodes/python-tests.el (python-nav-end-of-statement-2):
New test.

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 6f4a343310c..e39ff08739b 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -1518,7 +1518,7 @@ of the statement."
                        ;; are somehow out of whack.  This has been
                        ;; observed when using `syntax-ppss' during
                        ;; narrowing.
-                       (cl-assert (> string-start last-string-end)
+                       (cl-assert (>= string-start last-string-end)
                                   :show-args
                                   "\
 Overlapping strings detected (start=%d, last-end=%d)")