add versionadded 1.4 tag

liwh · liwh · commit ee703199c4ca · 2021-10-09T16:57:04.000+08:00
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
@@ -9428,6 +9428,8 @@ def corr(
             Ignored when method argument is not callable. If False, pairwise
             correlation between a column and itself is default to 1.
 
+            .. versionadded:: 1.4.0
+
         Returns
         -------
         DataFrame
