DOC: correct header line in v0.24.0 (pandas-dev#21218)

jorisvandenbossche · david-liu-brattle-1 · commit dfeb975c84b2 · 2018-06-18T14:30:34.000-04:00
diff --git a/doc/source/whatsnew/v0.24.0.txt b/doc/source/whatsnew/v0.24.0.txt
@@ -1,7 +1,7 @@
 .. _whatsnew_0240:
 
 v0.24.0
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+-------
 
 .. _whatsnew_0240.enhancements:
 
