fix grammar

Author: hootlex

src/guide/components.md

@@ -5,7 +5,7 @@ order: 12
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 ##What are Components?
-Components are one of the most powerful features of Vue.js, helping you extend basic HTML elements and create reusable code. At a high level, Components are custom elements that Vue.js’ compiler attaches a specified behavior, or even transforms the elements and their children.
+Components are one of the most powerful features of Vue.js, helping you extend basic HTML elements and create reusable code. At a high level, Components are custom elements that Vue.js’ compiler would attach specified behavior to, or even transform the elements and their children.
 
 In some cases, a Component is indicated with a special attribute on an HTML element.