pythongh-119580: Improve version added section for convenience variable (python#119583)

gaogaotiantian · estyxx · commit 5e86c5ed2848 · 2024-07-17T09:51:30.000+01:00
diff --git a/Doc/library/pdb.rst b/Doc/library/pdb.rst
@@ -290,6 +290,8 @@ There are three preset *convenience variables*:
 
 .. versionadded:: 3.12
 
+   Added the *convenience variable* feature.
+
 .. index::
    pair: .pdbrc; file
    triple: debugger; configuration; file
