Minor grammatical changes to comparison section (#944)

Author: tomquirk

src/v2/guide/comparison.md

@@ -62,7 +62,7 @@ In Vue, we also have [render functions](render-function.html) and even [support
 
 - You can even use pre-processors such as Pug (formerly known as Jade) to author your Vue templates.
 
-Some argue that you'd need to learn an extra DSL (Domain-Specific Language) to be able to write templates - we believe this difference is superficial at best. First, JSX doesn't mean the user don't need to learn anything - it's additional syntax on top of plain JavaScript, so it's easy for anyone familiar with JavaScript to learn, but saying it's essentially free is misleading. Similarly, template is just additional syntax on top of plain HTML and thus has very low learning cost for those who are already familiar with HTML. With the DSL we are also able to help the user get more done with less code (e.g. `v-on` modifiers). The same task can involve a lot more code when using plain JSX or render functions.
+Some argue that you'd need to learn an extra DSL (Domain-Specific Language) to be able to write templates - we believe this difference is superficial at best. First, JSX doesn't mean the user doesn't need to learn anything - it's additional syntax on top of plain JavaScript, so it's easy for anyone familiar with JavaScript to learn, but saying it's essentially free is misleading. Similarly, a template is just additional syntax on top of plain HTML and thus has very low learning cost for those who are already familiar with HTML. With the DSL we are also able to help the user get more done with less code (e.g. `v-on` modifiers). The same task can involve a lot more code when using plain JSX or render functions.
 
 On a higher level, we can divide components into two categories: presentational ones and logical ones. We recommend using templates for presentational components and render function / JSX for logical ones. The percentage of these components depends on the type of app you are building, but in general we find presentational ones to be much more common.