diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 37e8e64..b9152dd 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -212,7 +212,7 @@
 
 The :meth:`str.format` method and the :class:`Formatter` class share the same
 syntax for format strings (although in the case of :class:`Formatter`,
-subclasses can define their own format string syntax.)
+subclasses can define their own format string syntax).
 
 Format strings contain "replacement fields" surrounded by curly braces ``{}``.
 Anything that is not contained in braces is considered literal text, which is