feat(jsonFilter): add optional arg to define custom indentation

src/Angular.js

@@ -969,7 +969,8 @@ function toJsonReplacer(key, value) {
  */
 function toJson(obj, pretty) {
   if (typeof obj === 'undefined') return undefined;
-  return JSON.stringify(obj, toJsonReplacer, pretty ? '  ' : null);
+  var spaces = pretty ? (angular.isNumber(pretty) ? new Array(pretty + 1).join(' ') : '  ') : null;
+  return JSON.stringify(obj, toJsonReplacer, spaces);
 }
 
 

src/ng/filter/filters.js

@@ -503,25 +503,28 @@ function dateFilter($locale) {
  *   the binding is automatically converted to JSON.
  *
  * @param {*} object Any JavaScript object (including arrays and primitive types) to filter.
+ * @param {number=} the number of spaces to use per indentation, defaults to 2.
  * @returns {string} JSON string.
  *
  *
  * @example
    <example>
      <file name="index.html">
-       <pre>{{ {'name':'value'} | json }}</pre>
+       <pre id="default-spacing">{{ {'name':'value'} | json }}</pre>
+       <pre id="custom-spacing">{{ {'name':'value'} | json:4 }}</pre>
      </file>
      <file name="protractor.js" type="protractor">
        it('should jsonify filtered objects', function() {
-         expect(element(by.binding("{'name':'value'}")).getText()).toMatch(/\{\n  "name": ?"value"\n}/);
+         expect(element(by.id('default-spacing')).getText()).toMatch(/\{\n  "name": ?"value"\n}/);
+         expect(element(by.id('custom-spacing')).getText()).toMatch(/\{\n    "name": ?"value"\n}/);
        });
      </file>
    </example>
  *
  */
 function jsonFilter() {
-  return function(object) {
-    return toJson(object, true);
+  return function(object, spacing) {
+    return toJson(object, spacing || true);
   };
 }