Patch checklist:Suggest adding a regression test

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/developer.texi

@@ -387,6 +387,8 @@ send a reminder by email. Your patch should eventually be dealt with.
 @item
     Lines with similar content should be aligned vertically when doing so
     improves readability.
+@item
+    Consider to add a regression test for your code.
 @end enumerate
 
 @section Patch review process