Update structure-widgets.md

Minor syntax changes.

docs/guide/structure-widgets.md

@@ -24,7 +24,7 @@ if you want to learn about the usage of a particular widget.
 Widgets are primarily used in [views](structure-views.md). You can call the [[yii\base\Widget::widget()]] method
 to use a widget in a view. The method takes a [configuration](concept-configurations.md) array for initializing
 the widget and returns the rendering result of the widget. For example, the following code inserts a date picker
-widget which is configured to use Russian language and keep the input in the `from_date` attribute of `$model`.
+widget which is configured to use the Russian language and keep the input in the `from_date` attribute of `$model`.
 
 ```php
 <?php
@@ -138,7 +138,7 @@ class HelloWidget extends Widget
 }
 ```
 
-As you can see, PHP output buffer is started in `init()` so that any output between the calls of `init()` and `run()`
+As you can see, PHP's output buffer is started in `init()` so that any output between the calls of `init()` and `run()`
 can be captured, processed and returned in `run()`.
 
 > Info: When you call [[yii\base\Widget::begin()]], a new instance of the widget will be created and the `init()` method
@@ -189,4 +189,4 @@ which can be utilized to solve the problem.
 
 When a widget contains view code only, it is very similar to a [view](structure-views.md). In fact, in this case,
 their only difference is that a widget is a redistributable class, while a view is just a plain PHP script
-that you would prefer to keep it within your application.
+that you would prefer to keep within your application.