Merge a split multi-line comment.

MFC after:	1 week

sys/fs/nullfs/null_subr.c

@@ -213,12 +213,9 @@ null_nodeget(mp, lowervp, vpp)
 	/*
 	 * We do not serialize vnode creation, instead we will check for
 	 * duplicates later, when adding new vnode to hash.
-	 *
 	 * Note that duplicate can only appear in hash if the lowervp is
 	 * locked LK_SHARED.
-	 */
-
-	/*
+	 *
 	 * Do the MALLOC before the getnewvnode since doing so afterward
 	 * might cause a bogus v_data pointer to get dereferenced
 	 * elsewhere if MALLOC should block.