Add sys.flags.quiet attribute for the new -q option, as noted missing by Eric in #1772833.
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 6aaf10c..d10defb 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -264,6 +264,11 @@
    +------------------------------+------------------------------------------+
    | :const:`bytes_warning`       | -b                                       |
    +------------------------------+------------------------------------------+
+   | :const:`quiet`               | -q                                       |
+   +------------------------------+------------------------------------------+
+
+   .. versionchanged:: 3.2
+      Added ``quiet`` attribute for the new :option:`-q` flag.
 
 
 .. data:: float_info