updating neighbor joining documentation

Author: stevenweaver

test/neighbor-join-test.js

@@ -1,24 +1,20 @@
-var fs = require("fs");
-
-var tape = require("tape"),
+const tape = require("tape"),
     phylotree = require("../dist/phylotree");
 
-tape("tip length export", function(test) {
+tape("neighbor joining", function(test) {
 
-	let D = [
+	const D = [
 			[0,  5,  9,  9, 8],
 			[5,  0, 10, 10, 9],
 			[9, 10,  0,  8, 7],
 			[9, 10,  8,  0, 3],
 			[8,  9,  7,  3, 0]
 	];
 
-	let nodeList = ["A","B","C","D","E"];
-	let nj = phylotree.neighborJoining(D, nodeList.length, nodeList)
-  let expectedTree = "((((A:2,B:3)InternalNode0:3,C:4)InternalNode1:2,D:2)InternalNode2:0.5,E:0.5):0;"
-  test.equal(nj.getNewick(), expectedTree)
+	const nodeList = ["A","B","C","D","E"];
+	const nj = phylotree.neighborJoining(D, nodeList.length, nodeList);
+  const expectedTree = "((((A:2,B:3)InternalNode0:3,C:4)InternalNode1:2,D:2)InternalNode2:0.5,E:0.5):0;";
+  test.equal(nj.getNewick(), expectedTree);
   test.end();
 
 });
-
-