clarified assert.isObject & assert.isNotObject documentation

Author: gdelmas

lib/chai/interface/assert.js

@@ -538,8 +538,8 @@ module.exports = function (chai, util) {
   /**
    * ### .isObject(value, [message])
    *
-   * Asserts that `value` is an object (as revealed by
-   * `Object.prototype.toString`).
+   * Asserts that `value` is an object of type 'Object' (as revealed by `Object.prototype.toString`).
+   * _The assertion does not match subclassed objects._
    *
    *     var selection = { name: 'Chai', serve: 'with spices' };
    *     assert.isObject(selection, 'tea selection is an object');
@@ -558,7 +558,7 @@ module.exports = function (chai, util) {
   /**
    * ### .isNotObject(value, [message])
    *
-   * Asserts that `value` is _not_ an object.
+   * Asserts that `value` is _not_ an object of type 'Object' (as revealed by `Object.prototype.toString`).
    *
    *     var selection = 'chai'
    *     assert.isNotObject(selection, 'tea selection is not an object');