Update runtime-bootstrapping.md

docs/guide/runtime-bootstrapping.md

@@ -10,7 +10,7 @@ registered. This includes the Composer autoloader through its `autoload.php` fil
 autoloader through its `Yii` class file. The entry script then loads the application
 [configuration](concept-configurations.md) and creates an [application](structure-applications.md) instance.
 
-In the constructor of the application, the following bootstrapping work are done:
+In the constructor of the application, the following bootstrapping work is done:
 
 1. [[yii\base\Application::preInit()|preInit()]] is called, which configures some high priority
    application properties, such as [[yii\base\Application::basePath|basePath]].
@@ -34,7 +34,7 @@ needs to register additional URL parsing rules, it should be listed in the
 [bootstrap property](structure-applications.md#bootstrap) so that the new URL rules can take effect
 before they are used to resolve requests.
 
-In production mode, enable bytecode cache, such as [PHP OPcache] or [APC], to minimize the time needed for including
+In production mode, enable a bytecode cache, such as [PHP OPcache] or [APC], to minimize the time needed for including
 and parsing PHP files.
 
 [PHP OPcache]: http://php.net/manual/en/intro.opcache.php