inserted empty lines before code blocks.

LearnRedux/Videos.md

@@ -128,6 +128,7 @@ export default rootReducer
 * actions invoke state changes
 * reducers change the state
 * the store provides a dispatch function
+    
     ```jsx
     // on the console
     $r.store.dispatch({type: 'INCREMENT', index: 1})
@@ -139,6 +140,7 @@ export default rootReducer
 * in regular React, the state or parts of it are propagated via props
 * in Redux, `connect` injects the data in the components that need it
 * for that, we wrap the main component with one that has the state and dispatcher propagated
+    
     ```jsx
     import { bindActionCreators } from 'redux'
     import { connect } from 'react-redux'
@@ -168,14 +170,16 @@ export default rootReducer
 ## Video 12: Updating State with Reducers
 * Once you propagate the reducer function to the component, this is how you pass arguments to the function call
     - Remember that `<button onClick={this.props.function(argument)} ...>` would call the function at document load!
-    ```jsx
+    
+    ```html
     <button onClick={this.props.function.bind(null, argument)} ...>
     ```
-
+    
 * Use pure functions to manipulate state. So the same inputs (previous state, action) always gives the same output (next state).
     - Makes testing easier.
     - Enables Redux dev tools, time travel etc.
 * Do the same as in React state handling: Copy, modify, return copy:
+    
     ```jsx
     function posts(state = [], action) {
         switch(action.type) {
@@ -195,6 +199,7 @@ export default rootReducer
 ## Video 13: Displaying the Single Photo Component
 * Polyfills are new ES6 functions cross compiled for old browsers through Babel. [Example for findIndex()][1]
 * You can use `findIndex()` to get a certain element of an array
+    
     ```jsx
     render () {
         const { postId } = this.props.params