Add a first pass at jsdoc.

[##130415655] #596

src/core/matchers/toBe.js

@@ -1,4 +1,12 @@
 getJasmineRequireObj().toBe = function() {
+  /**
+   * {@link expect} the actual value to be `===` to the expected value.
+   * @function
+   * @name matchers#toBe
+   * @param {Object} expected - The expected value to compare against.
+   * @example
+   * expect(thing).toBe(realThing);
+   */
   function toBe() {
     return {
       compare: function(actual, expected) {