Fix astuple in dataclasses documentation (GH-9631)

(cherry picked from commit 508d8205121868ef24cca99f1f952558b1ff2f2e)

Co-authored-by: 방성범 (Bang Seongbeom) <bangseongbeom@hotmail.com>

diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index 2efa2c51a459a38f1a5648754015569b4a2f2fe0..fe0feeda8b87870098f5935b1181f373d85ba1aa 100644 (file)
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -309,7 +309,7 @@ Module-level decorators, classes, and functions
 
    Raises :exc:`TypeError` if ``instance`` is not a dataclass instance.
 
-.. function:: astuple(*, tuple_factory=tuple)
+.. function:: astuple(instance, *, tuple_factory=tuple)
 
    Converts the dataclass ``instance`` to a tuple (by using the
    factory function ``tuple_factory``).  Each dataclass is converted