Issue #19795: Improved markup of True/False constants.
diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
index 16de3ca..daf28de 100644
--- a/Doc/library/ast.rst
+++ b/Doc/library/ast.rst
@@ -244,6 +244,6 @@
    Return a formatted dump of the tree in *node*.  This is mainly useful for
    debugging purposes.  The returned string will show the names and the values
    for fields.  This makes the code impossible to evaluate, so if evaluation is
-   wanted *annotate_fields* must be set to False.  Attributes such as line
+   wanted *annotate_fields* must be set to ``False``.  Attributes such as line
    numbers and column offsets are not dumped by default.  If this is wanted,
    *include_attributes* can be set to ``True``.