Fix a JSON doc typo
diff --git a/Doc/library/json.rst b/Doc/library/json.rst
index 0229ab5..a5bfcd2 100644
--- a/Doc/library/json.rst
+++ b/Doc/library/json.rst
@@ -146,7 +146,7 @@
object members will be pretty-printed with that indent level. An indent level
of 0, negative, or ``""`` will only insert newlines. ``None`` (the default)
selects the most compact representation. Using a positive integer indent
- indents that many spaces per level. If *indent* is a string (such at '\t'),
+ indents that many spaces per level. If *indent* is a string (such as ``"\t"``),
that string is used to indent each level.
If *separators* is an ``(item_separator, dict_separator)`` tuple, then it