fix(ngPluralize): fixes ng-pluralize when using non-standard start/end symbols

Closes #1134

Author: btford

src/ng/directive/ngPluralize.js

@@ -178,11 +178,14 @@ var ngPluralizeDirective = ['$locale', '$interpolate', function($locale, $interp
           whenExp = element.attr(attr.$attr.when), // this is because we have {{}} in attrs
           offset = attr.offset || 0,
           whens = scope.$eval(whenExp),
-          whensExpFns = {};
+          whensExpFns = {},
+          startSymbol = $interpolate.startSymbol(),
+          endSymbol = $interpolate.endSymbol();
 
       forEach(whens, function(expression, key) {
         whensExpFns[key] =
-          $interpolate(expression.replace(BRACE, '{{' + numberExp + '-' + offset + '}}'));
+          $interpolate(expression.replace(BRACE, startSymbol + numberExp + '-' +
+            offset + endSymbol));
       });
 
       scope.$watch(function() {

test/ng/directive/ngPluralizeSpec.js

@@ -133,4 +133,41 @@ describe('ngPluralize', function() {
       expect(element.text()).toBe('Igor, Misko and 2 other people are viewing.');
     }));
   });
+
+
+  describe('interpolation', function() {
+
+    it('should support custom interpolation symbols', function() {
+      module(function($interpolateProvider) {
+        $interpolateProvider.startSymbol('[[').endSymbol('%%');
+      });
+
+      inject(function($compile, $rootScope) {
+        element = $compile(
+            "<ng:pluralize count=\"viewCount\" offset=\"1\"" +
+              "when=\"{'0': 'Nobody is viewing.'," +
+                      "'1': '[[p1%% is viewing.'," +
+                      "'one': '[[p1%% and one other person are viewing.'," +
+                      "'other': '[[p1%% and {} other people are viewing.'}\">" +
+            "</ng:pluralize>")($rootScope);
+        $rootScope.p1 = 'Igor';
+
+        $rootScope.viewCount = 0;
+        $rootScope.$digest();
+        expect(element.text()).toBe('Nobody is viewing.');
+
+        $rootScope.viewCount = 1;
+        $rootScope.$digest();
+        expect(element.text()).toBe('Igor is viewing.');
+
+        $rootScope.viewCount = 2;
+        $rootScope.$digest();
+        expect(element.text()).toBe('Igor and one other person are viewing.');
+
+        $rootScope.viewCount = 3;
+        $rootScope.$digest();
+        expect(element.text()).toBe('Igor and 2 other people are viewing.');
+      });
+    })
+  });
 });