adjust a note format

kubernetes · Mar 22, 2018 · 8c4110d · 8c4110d
1 parent 0d07a6b
commit 8c4110d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/docs/concepts/overview/working-with-objects/labels.md b/docs/concepts/overview/working-with-objects/labels.md
@@ -58,6 +58,7 @@ An empty label selector (that is, one with zero requirements) selects every obje
 A null label selector (which is only possible for optional selector fields) selects no objects.
 
 **Note**: the label selectors of two controllers must not overlap within a namespace, otherwise they will fight with each other.
+{: .note}
 
 ### _Equality-based_ requirement