Correct typo and reformat whatsnew entry

MarcoGorelli · MarcoGorelli · commit a679508f2cf7 · 2019-08-16T09:42:55.000+01:00
diff --git a/doc/source/whatsnew/v0.25.1.rst b/doc/source/whatsnew/v0.25.1.rst
@@ -21,13 +21,11 @@ Other enhancements
 Bug fixes
 ~~~~~~~~~
 
-- Bug in :func:`fill_na` in :meth:`Categorical.fillna` would replace all values, not just those that are NaN (:issue:`26215`)
-
 
 Categorical
 ^^^^^^^^^^^
 
--
+- Bug in :meth:`Categorical.fillna` would replace all values, not just those that are ``NaN`` (:issue:`26215`)
 -
 -
 

Original file line number	Diff line number	Diff line change
`@@ -21,13 +21,11 @@ Other enhancements`
`21`	`21`	`Bug fixes`
`22`	`22`	`~~~~~~~~~`
`23`	`23`
`24`		-- Bug in :func:`fill_na` in :meth:`Categorical.fillna` would replace all values, not just those that are NaN (:issue:`26215`)
`25`		`-`
`26`	`24`
`27`	`25`	`Categorical`
`28`	`26`	`^^^^^^^^^^^`
`29`	`27`
`30`		`--`
	`28`	+- Bug in :meth:`Categorical.fillna` would replace all values, not just those that are ``NaN`` (:issue:`26215`)
`31`	`29`	`-`
`32`	`30`	`-`
`33`	`31`