Make "case" keyword a dedenter in Python

* lisp/progmodes/python.el (python-rx): Add "case" to dedenter.
(python-info-dedenter-opening-block-positions): Add "case" to pairs.
* test/lisp/progmodes/python-tests.el (python-indent-dedenters-9):
New test.

1 files changed, 3 insertions, 2 deletions

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index 1980815bae9..8793fdc6458 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -426,7 +426,7 @@ This variant of `rx' supports common Python named REGEXPS."
                                              (or "def" "for" "with")))
                                     symbol-end))
             (dedenter          (seq symbol-start
-                                    (or "elif" "else" "except" "finally")
+                                    (or "elif" "else" "except" "finally" "case")
                                     symbol-end))
             (block-ender       (seq symbol-start
                                     (or
@@ -5783,7 +5783,8 @@ likely an invalid python file."
                (pairs '(("elif" "elif" "if")
                         ("else" "if" "elif" "except" "for" "while")
                         ("except" "except" "try")
-                        ("finally" "else" "except" "try")))
+                        ("finally" "else" "except" "try")
+                        ("case" "case")))
                (dedenter (match-string-no-properties 0))
                (possible-opening-blocks (cdr (assoc-string dedenter pairs)))
                (collected-indentations)