Add whatsnew entry

Marco Gorelli · MarcoGorelli · commit 0496af743d71 · 2019-09-03T08:18:46.000+01:00
diff --git a/doc/source/whatsnew/v0.25.2.rst b/doc/source/whatsnew/v0.25.2.rst
@@ -49,7 +49,7 @@ Interval
 Indexing
 ^^^^^^^^
 
--
+- Frame gets duplicated when exploding a single column and there are duplicates in the index (:issue:`28010`).
 -
 -
 -

Original file line number	Diff line number	Diff line change
`@@ -49,7 +49,7 @@ Interval`
`49`	`49`	`Indexing`
`50`	`50`	`^^^^^^^^`
`51`	`51`
`52`		`--`
	`52`	+- Frame gets duplicated when exploding a single column and there are duplicates in the index (:issue:`28010`).
`53`	`53`	`-`
`54`	`54`	`-`
`55`	`55`	`-`