Merge commit '87b5d4ee61605b026506e92c9e8873d867c5f150' into es6-modules

Conflicts:
	dist/handlebars.js
	dist/handlebars.runtime.js
	lib/handlebars/base.js
	lib/handlebars/utils.js

lib/handlebars/base.js

@@ -117,7 +117,7 @@ function registerDefaultHelpers(instance) {
     var type = toString.call(conditional);
     if(type === functionType) { conditional = conditional.call(this); }
 
-    if(!conditional || isEmpty(conditional)) {
+    if (isEmpty(conditional)) {
       return options.inverse(this);
     } else {
       return options.fn(this);

lib/handlebars/compiler/javascript-compiler.js

@@ -348,10 +348,10 @@ JavaScriptCompiler.prototype = {
   // [lookupData]
   //
   // On stack, before: ...
-  // On stack, after: data[id], ...
+  // On stack, after: data, ...
   //
-  // Push the result of looking up `id` on the current data
-  lookupData: function(id) {
+  // Push the data lookup operator
+  lookupData: function() {
     this.push('data');
   },
 

lib/handlebars/utils.js

@@ -19,7 +19,7 @@ export function SafeString(string) {
 };
 
 SafeString.prototype.toString = function() {
-  return this.string.toString();
+  return "" + this.string;
 };
 
 var escape = {
@@ -57,7 +57,7 @@ export function escapeExpression(string) {
   // Force a string conversion as this will be done by the append regardless and
   // the regex test will do this transparently behind the scenes, causing issues if
   // an object's to string has escaped characters in it.
-  string = string.toString();
+  string = "" + string;
 
   if(!possible.test(string)) { return string; }
   return string.replace(badChars, escapeChar);