#554 don't initialize ctx.retain

mithril.js

@@ -318,7 +318,7 @@ var m = (function app(window, undefined) {
 			}
 			//schedule configs to be called. They are called after `build` finishes running
 			if (typeof data.attrs["config"] === FUNCTION) {
-				var context = cached.configContext = cached.configContext || {retain: (m.redraw.strategy() == "diff") || undefined};
+				var context = cached.configContext = cached.configContext || {};
 
 				// bind
 				var callback = function(data, args) {

tests/mithril-tests.js

@@ -2829,48 +2829,6 @@ function testMithril(mock) {
 		mock.requestAnimationFrame.$resolve()
 		mock.location.search = "?"
 		
-		var root = mock.document.createElement("div")
-		var value
-		
-		var a = {}
-		a.controller = function() {}
-		a.view = function() {
-			return m("a", {config: function(el, init, ctx) {
-				value = ctx.retain
-			}})
-		}
-		
-		m.route(root, "/a", {
-			"/a": a
-		})
-		
-		return !value
-	})
-	test(function() {
-		mock.requestAnimationFrame.$resolve()
-		mock.location.search = "?"
-		
-		var root = mock.document.createElement("div")
-		var value
-		
-		var a = {}
-		a.controller = function() {m.redraw.strategy("diff")}
-		a.view = function() {
-			return m("a", {config: function(el, init, ctx) {
-				value = ctx.retain
-			}})
-		}
-		
-		m.route(root, "/a", {
-			"/a": a
-		})
-		
-		return value
-	})
-	test(function() {
-		mock.requestAnimationFrame.$resolve()
-		mock.location.search = "?"
-		
 		var root = mock.document.createElement("div")
 		var initCount = 0