imaplib: simplify & clarify idle debug message

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>

diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index 0ccb220868c95e8b3cf1c14c4d7dbe923c2a4f47..25c3e017fe4be254e9e56a02fd2d2735638731d2 100644 (file)
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -1407,8 +1407,7 @@ class _Idler:
         assert not (imap._idle_responses or imap._idle_capture)
 
         if __debug__ and imap.debug >= 4:
-            imap._mesg('idle start'
-                       + ('' if self._dur is None else f' dur={self._dur}'))
+            imap._mesg(f'idle start duration={self._dur}')
 
         try:
             # Start capturing untagged responses before sending IDLE,