Fix font-lock of Python f-strings

* lisp/progmodes/python.el (python--font-lock-f-strings): Bind
'parse-sexp-ignore-comments' to nil so that we can look for
closing braces even if a hash is used in the format specifier.
* test/lisp/progmodes/python-tests.el
(python-font-lock-f-string-1): New test.  (Bug#74738)

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 4a1cfc6c072..5729b12573f 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -623,7 +623,9 @@ the {...} holes that appear within f-strings."
               (forward-char 1)          ;Just skip over {{
             (let ((beg (match-beginning 0))
                   (end (condition-case nil
-                           (progn (up-list 1) (min send (point)))
+                           (let ((parse-sexp-ignore-comments))
+                             (up-list 1)
+                             (min send (point)))
                          (scan-error send))))
               (goto-char end)
               (put-text-property beg end 'face nil))))