fixup whatsnew

jreback · jreback · commit a858805495ac · 2019-06-25T16:17:03.000-04:00
diff --git a/doc/source/whatsnew/v0.25.0.rst b/doc/source/whatsnew/v0.25.0.rst
@@ -573,7 +573,7 @@ Performance Improvements
 - Improved performance of :attr:`IntervalIndex.is_unique` by removing conversion to ``MultiIndex`` (:issue:`24813`)
 - Restored performance of :meth:`DatetimeIndex.__iter__` by re-enabling specialized code path (:issue:`26702`)
 - Improved performance when building :class:`MultiIndex` with at least one :class:`CategoricalIndex` level (:issue:`22044`)
-- Improved performance by removing the need for a garbage collect when checking for ``SettingWithCopyWarning`` (:issue:``)
+- Improved performance by removing the need for a garbage collect when checking for ``SettingWithCopyWarning`` (:issue:`27031`)
 
 .. _whatsnew_0250.bug_fixes:
 
