[3.13] gh-128017: Make a note that sys variables are read-only (GH-128887) (#128908)

Co-authored-by: Srinivas Reddy Thatiparthy (తాటిపర్తి శ్రీనివాస్  రెడ్డి) <thatiparthysreenivas@gmail.com>

diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index fdacf5aff8c455a65b9b12aeb59ef2ddd41db60d..7af7a7c0d7c47b32bdaf298a83729a7a63cdbd6e 100644 (file)
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -8,7 +8,7 @@
 
 This module provides access to some variables used or maintained by the
 interpreter and to functions that interact strongly with the interpreter. It is
-always available.
+always available. Unless explicitly noted otherwise, all variables are read-only.
 
 
 .. data:: abiflags