docs(httpBackend): update documentation for expect methods

`expect` methods can receive an Object as the data parameter, which was
undocumented.

Author: santialbo

src/ngMock/angular-mocks.js

@@ -1088,7 +1088,9 @@ function createHttpBackendMock($delegate, $browser) {
    *
    * @param {string} method HTTP method.
    * @param {string|RegExp} url HTTP url.
-   * @param {(string|RegExp)=} data HTTP request body.
+   * @param {(string|RegExp|function(string)|Object)=} data HTTP request body or function that
+   *  receives data string and returns true if the data is as expected, or Object if request body
+   *  is in JSON format.
    * @param {(Object|function(Object))=} headers HTTP headers or function that receives http header
    *   object and returns true if the headers match the current expectation.
    * @returns {requestHandler} Returns an object with `respond` method that control how a matched
@@ -1157,7 +1159,9 @@ function createHttpBackendMock($delegate, $browser) {
    * Creates a new request expectation for POST requests. For more info see `expect()`.
    *
    * @param {string|RegExp} url HTTP url.
-   * @param {(string|RegExp)=} data HTTP request body.
+   * @param {(string|RegExp|function(string)|Object)=} data HTTP request body or function that
+   *  receives data string and returns true if the data is as expected, or Object if request body
+   *  is in JSON format.
    * @param {Object=} headers HTTP headers.
    * @returns {requestHandler} Returns an object with `respond` method that control how a matched
    *   request is handled.
@@ -1171,7 +1175,9 @@ function createHttpBackendMock($delegate, $browser) {
    * Creates a new request expectation for PUT requests. For more info see `expect()`.
    *
    * @param {string|RegExp} url HTTP url.
-   * @param {(string|RegExp)=} data HTTP request body.
+   * @param {(string|RegExp|function(string)|Object)=} data HTTP request body or function that
+   *  receives data string and returns true if the data is as expected, or Object if request body
+   *  is in JSON format.
    * @param {Object=} headers HTTP headers.
    * @returns {requestHandler} Returns an object with `respond` method that control how a matched
    *   request is handled.
@@ -1185,7 +1191,9 @@ function createHttpBackendMock($delegate, $browser) {
    * Creates a new request expectation for PATCH requests. For more info see `expect()`.
    *
    * @param {string|RegExp} url HTTP url.
-   * @param {(string|RegExp)=} data HTTP request body.
+   * @param {(string|RegExp|function(string)|Object)=} data HTTP request body or function that
+   *  receives data string and returns true if the data is as expected, or Object if request body
+   *  is in JSON format.
    * @param {Object=} headers HTTP headers.
    * @returns {requestHandler} Returns an object with `respond` method that control how a matched
    *   request is handled.