Minor fixes for Adminhtml section (#1)

Author: snowcore

6. Developing with Adminhtml/1. Describe common structure architecture.md

@@ -123,14 +123,14 @@ In *frontend* URLs are generated with `\Magento\Framework\Url.getUrl`:
 - getUrl() -> createUrl() = getRouterUrl + ?query + #fragment
 - getRouterUrl() = getBaseUrl() + `_getRoutePath`
 - getBaseUrl() example 'http://www.example.com/'
-- `_getRoutePath` = `_getActionPath` + params pairs. sexample 'catalog/product/view/id/47'
-- `_getActionPath` example 'catalog/product/view'
+- `_getRoutePath` = `_getActionPath` + params pairs. For example: 'catalog/product/view/id/47'
+- `_getActionPath` example: 'catalog/product/view'
 
 In *backend* use customized version `\Magento\Backend\Model\Url`:
 - `_getActionPath` *prepends* area front name, e.g. 'kontrollpanel/catalog/product/view'.
   Now all backend links have this prefix.
 - getUrl() adds secret key /key/hash
-- can disable secret key generation with turnOffSecretKey() and revert with turnOnnSecretKey().
+- can disable secret key generation with turnOffSecretKey() and revert with turnOnSecretKey().
   Global admin config `admin/security/use_form_key`.
 
 *Secret key* = `hash($routeName . $controllerName . $actionName . $sessionFormKey)`