diff --git a/src/flask/scaffold.py b/src/flask/scaffold.py
index 42eabcfc..cbe76cb1 100644
--- a/src/flask/scaffold.py
+++ b/src/flask/scaffold.py
@@ -589,8 +589,8 @@ class Scaffold:
         stack of active contexts.  This becomes relevant if you are using
         such constructs in tests.
 
-        Teardown functions must avoid raising exceptions, since they . If they
-        execute code that might fail they
+        Teardown functions must avoid raising exceptions, because if
+        they execute code that might fail they
         will have to surround the execution of these code by try/except
         statements and log occurring errors.