From b79abf82039067c2e9e9c1d2f5d50828457965f5 Mon Sep 17 00:00:00 2001
From: Cedric Venet <c.v@fr>
Date: Sun, 11 May 2014 23:50:35 +0200
Subject: [PATCH] Make optional the before argument of enter().insert('')

From the documentation: "For enter selections, the before selector may
be omitted, [...]"
---
 d3/d3.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index 0b049726bc..42f94d0c66 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -811,7 +811,7 @@ declare module D3 {
 
     export interface EnterSelection {
         append: (name: string) => Selection;
-        insert: (name: string, before: string) => Selection;
+        insert: (name: string, before?: string) => Selection;
         select: (selector: string) => Selection;
         empty: () => boolean;
         node: () => Element;