Fix grammar
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index d45eb36..3f9ec0b 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -709,9 +709,9 @@
to parse template strings. To do this, you can override these class attributes:
* *delimiter* -- This is the literal string describing a placeholder introducing
- delimiter. The default value ``$``. Note that this should *not* be a regular
- expression, as the implementation will call :meth:`re.escape` on this string as
- needed.
+ delimiter. The default value is ``$``. Note that this should *not* be a
+ regular expression, as the implementation will call :meth:`re.escape` on this
+ string as needed.
* *idpattern* -- This is the regular expression describing the pattern for
non-braced placeholders (the braces will be added automatically as