[3.12] gh-121160: Note that readline libraries using different history formats. ...

This is not something we can do too much about, without help from the
underlying libraries.
(cherry picked from commit 709db44255eb5d73fc22a1341dd0253e71ddfda9)

diff --git a/Doc/library/readline.rst b/Doc/library/readline.rst
index 43cf8d5cdac5440bcf7170edb974e1daa23c7205..f02aec8a6a810582c8f7978e3e86a753a14e1574 100644 (file)
--- a/Doc/library/readline.rst
+++ b/Doc/library/readline.rst
@@ -44,6 +44,10 @@ Readline library in general.
     python:bind -v
     python:bind ^I rl_complete
 
+  Also note that different libraries may use different history file formats.
+  When switching the underlying library, existing history files may become
+  unusable.
+
 
 Init file
 ---------