emacs-29 29228e24f20: python-info-dedenter-opening-block-positions: Fix to support "bare" match

[Dmitry Gutov]

branch: emacs-29
commit 29228e24f20954b93dccef4ac5d704ca31daa80c
Author: Dmitry Gutov <dgutov@yandex.ru>
Commit: Dmitry Gutov <dgutov@yandex.ru>

    python-info-dedenter-opening-block-positions: Fix to support "bare" match
    
    * lisp/progmodes/python.el
    (python-info-dedenter-opening-block-positions): Make the check
    stricter.  Require that block starts only at indentation.
    
    * test/lisp/progmodes/python-tests.el
    (python-indent-after-bare-match): Another test (bug#62031).
---
 lisp/progmodes/python.el            |  4 +++-
 test/lisp/progmodes/python-tests.el | 14 ++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 5b11d204de1..1980815bae9 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -5792,7 +5792,9 @@ likely an invalid python file."
             (while (python-nav--syntactically
                     (lambda ()
                       (cl-loop while (re-search-backward (python-rx 
block-start) nil t)
-                               if (memq (char-before) '(nil ?\s ?\t ?\n))
+                               if (save-match-data
+                                    (looking-back (rx line-start (* 
whitespace))
+                                                  (line-beginning-position)))
                                return t))
                     #'<)
               (let ((indentation (current-indentation)))
diff --git a/test/lisp/progmodes/python-tests.el 
b/test/lisp/progmodes/python-tests.el
index 7e2f66e9095..2568299bb66 100644
--- a/test/lisp/progmodes/python-tests.el
+++ b/test/lisp/progmodes/python-tests.el
@@ -1994,6 +1994,20 @@ def test_re(string):
    (python-tests-look-at "else:")
    (should (= (python-indent-calculate-indentation) 4))))
 
+(ert-deftest python-indent-after-bare-match ()
+  "Test BUG 62031 regression."
+  (python-tests-with-temp-buffer
+   "
+from re import match
+
+def test_re(string):
+    if match('^[a-c]+$', string):
+        print('yes')
+    else:
+    "
+   (python-tests-look-at "else:")
+   (should (= (python-indent-calculate-indentation) 4))))
+
 
 ;;; Filling