feat($interpolate): expose start/end symbols in run phase

previously the startSymbol() and endSymbol() getters were exposed only via provider
in the config phase

src/ng/interpolate.js

@@ -89,7 +89,7 @@ function $InterpolateProvider() {
      *      against.
      *
      */
-    return function(text, mustHaveExpression) {
+    function $interpolate(text, mustHaveExpression) {
       var startIndex,
           endIndex,
           index = 0,
@@ -141,7 +141,43 @@ function $InterpolateProvider() {
         fn.parts = parts;
         return fn;
       }
-    };
+    }
+
+
+    /**
+     * @ngdoc method
+     * @name ng.$interpolate#startSymbol
+     * @methodOf ng.$interpolate
+     * @description
+     * Symbol to denote the start of expression in the interpolated string. Defaults to `{{`.
+     *
+     * Use {@link ng.$interpolateProvider#startSymbol $interpolateProvider#startSymbol} to change
+     * the symbol.
+     *
+     * @returns {string} start symbol.
+     */
+    $interpolate.startSymbol = function() {
+      return startSymbol;
+    }
+
+
+    /**
+     * @ngdoc method
+     * @name ng.$interpolate#endSymbol
+     * @methodOf ng.$interpolate
+     * @description
+     * Symbol to denote the end of expression in the interpolated string. Defaults to `}}`.
+     *
+     * Use {@link ng.$interpolateProvider#endSymbol $interpolateProvider#endSymbol} to change
+     * the symbol.
+     *
+     * @returns {string} start symbol.
+     */
+    $interpolate.endSymbol = function() {
+      return endSymbol;
+    }
+
+    return $interpolate;
   }];
 }
 

test/ng/interpolateSpec.js

@@ -113,6 +113,11 @@ describe('$interpolate', function() {
     }));
 
 
+    it('should expose the startSymbol in run phase', inject(function($interpolate) {
+      expect($interpolate.startSymbol()).toBe('((');
+    }));
+
+
     it('should not get confused by matching start and end symbols', function() {
       module(function($interpolateProvider) {
         $interpolateProvider.startSymbol('--');
@@ -139,5 +144,10 @@ describe('$interpolate', function() {
     it('should expose the endSymbol in config phase', module(function($interpolateProvider) {
       expect($interpolateProvider.endSymbol()).toBe('))');
     }));
+
+
+    it('should expose the endSymbol in run phase', inject(function($interpolate) {
+      expect($interpolate.endSymbol()).toBe('))');
+    }));
   });
 });