gh-132608: Fix a sample code coloring for ast.While (#132609)

Add missing '>' in prompt.

diff --git a/Doc/library/ast.rst b/Doc/library/ast.rst
index fd901e232855b549918aec351cc293de96e81a7f..1a04d42e5f5d7e8478e9d9b46144d9865a75424f 100644 (file)
--- a/Doc/library/ast.rst
+++ b/Doc/library/ast.rst
@@ -1190,7 +1190,7 @@ Control flow
 
    .. doctest::
 
-        >> print(ast.dump(ast.parse("""
+        >>> print(ast.dump(ast.parse("""
         ... while x:
         ...    ...
         ... else: