message: chore(docs): skip markdown doctest
diff: @@ -29,6 +29,7 @@ any way the developer sees fit, but here are some guidelines:
  <!-- share-code-between-examples -->
  ### Example
  +<!-- skip-example -->
  ```js
  function mySimpleOperator(someCallback) {
  // We *could* do a `var self = this;` here to close over, but see next comment
  @@ -62,12 +63,14 @@ There are a few ways to do this. It's really down to needs and preference:
  1) Use the ES7 function bind operator (`::`) available in transpilers like [BabelJS](http://babeljs.io):
  +<!-- skip-example -->
  ```js
  someObservable::mySimpleOperator(x => x + '!');
  ```
  2) Create your own Observable subclass and override `lift` to return it:
  +<!-- skip-example -->
  ```js
  class MyObservable extends Observable {
  lift(operator) {
  @@ -89,6 +92,7 @@ MyObservable.prototype.mySimpleOperator = mySimpleOperator;
  3) Patch `Observable.prototype` directly:
  +<!-- skip-example -->
  ```js
  Observable.prototype.mySimpleOperator = mySimpleOperator;
  @@ -103,6 +107,7 @@ If you don't want to patch the Observable prototype, you can also write the oper
  Example implementation:
  +<!-- skip-example -->
  ```js
  function mySimpleOperator(someCallback) {
  // notice that we return a function here
  @@ -126,6 +131,7 @@ function mySimpleOperator(someCallback) {
  This can now be used with the `let()` method on the Observable:
  +<!-- skip-example -->
  ```js
  const obs = someObservable.let(mySimpleOperator(x => x + '!'));
  ```
  