Issue 13573: Document that csv.writer uses str() for floats instead of repr().
diff --git a/Doc/library/csv.rst b/Doc/library/csv.rst
index d3d505e..dbef60f 100644
--- a/Doc/library/csv.rst
+++ b/Doc/library/csv.rst
@@ -112,6 +112,7 @@
value :const:`None` is written as the empty string. While this isn't a
reversible transformation, it makes it easier to dump SQL NULL data values to
CSV files without preprocessing the data returned from a ``cursor.fetch*`` call.
+ Floats are stringified with :func:`repr` before being written.
All other non-string data are stringified with :func:`str` before being written.
A short usage example::