fix a typo

Change-Id: I9564435d771fa1ab9f3641ff837ee8d96a704de0
diff --git a/core/net/src/main/java/org/onosproject/net/device/impl/DeviceManager.java b/core/net/src/main/java/org/onosproject/net/device/impl/DeviceManager.java
index eb477be..ae8018e 100644
--- a/core/net/src/main/java/org/onosproject/net/device/impl/DeviceManager.java
+++ b/core/net/src/main/java/org/onosproject/net/device/impl/DeviceManager.java
@@ -810,7 +810,7 @@
     }
 
     /**
-     * Reaasert role for specified device connected to this node.
+     * Reassert role for specified device connected to this node.
      *
      * @param did      device identifier
      * @param nextRole role to apply. If NONE is specified,