fix rst linting

GiacomoPope · GiacomoPope · commit 5204a5ee3b29 · 2024-03-14T11:19:18.000Z
diff --git a/src/sage/rings/polynomial/multi_polynomial_element.py b/src/sage/rings/polynomial/multi_polynomial_element.py
@@ -724,7 +724,7 @@ def total_degree(self):
             sage: f.total_degree()
             10
 
-        TESTS::
+        TESTS:
 
         Ensure that :issue:`37603` is fixed::
              sage: R.<x,y,z> = QQbar[]
