[fix] className to class (Angular guide)

Author: serhiipylypchuk1991

docs/angular_integration.md

@@ -89,7 +89,7 @@ import { Component, ElementRef, OnInit, ViewChild, OnDestroy, ViewEncapsulation
     encapsulation: ViewEncapsulation.None,
     selector: 'spreadsheet', // a template name used in the "app.component.ts" file as <spreadsheet/>
     styleUrls: ['./spreadsheet.component.css'], // include a css file
-    template: `<div #container class="widget"></div>`
+    template: `<div #container class = "widget"></div>`
 })
 
 export class SpreadsheetComponent implements OnInit, OnDestroy {
@@ -190,7 +190,7 @@ import { Component, ElementRef, OnInit, ViewChild, OnDestroy, ViewEncapsulation
     encapsulation: ViewEncapsulation.None,
     selector: 'spreadsheet', 
     styleUrls: ['./spreadsheet.component.css'],
-    template: `<div #container class="widget"></div>`
+    template: `<div #container class = "widget"></div>`
 })
 
 export class SpreadsheetComponent implements OnInit, OnDestroy {

docs/react_integration.md

@@ -60,7 +60,7 @@ Download the [**trial Spreadsheet package**](/how_to_start/#installing-spreadshe
 
 ### Step 2. Component creation
 
-Now you need to create a React component, to add an Spreadsheet into the application. Create a new file in the ***src/*** directory and name it ***Spreadsheet.jsx***.
+Now you need to create a React component, to add Spreadsheet into the application. Create a new file in the ***src/*** directory and name it ***Spreadsheet.jsx***.
 
 #### Import source files