typo fix (close #97)

Author: yyx990803

source/guide/index.md

@@ -49,7 +49,7 @@ A slightly modified plain JavaScript object.
 vm.$data // The Model
 ```
 
-In Vue.js, models are simply plain JavaScript objects, or **data objects**. Once an object is used as data inside a Vue instnace, it becomes **reactive**. You can manipulate their properties and Vue instances that are observing them will be notified of the changes. Vue.js achieves transparent reactivity by converting the properties on data objects into ES5 getter/setters. There's no need for dirty checking, nor do you have to explicitly signal Vue to update the View. Whenever the data changes, the View is updated on the next frame.
+In Vue.js, models are simply plain JavaScript objects, or **data objects**. Once an object is used as data inside a Vue instance, it becomes **reactive**. You can manipulate their properties and Vue instances that are observing them will be notified of the changes. Vue.js achieves transparent reactivity by converting the properties on data objects into ES5 getter/setters. There's no need for dirty checking, nor do you have to explicitly signal Vue to update the View. Whenever the data changes, the View is updated on the next frame.
 
 Vue instances proxy all properties on data objects they observe. So once an object `{ a: 1 }` has been observed, both `vm.$data.a` and `vm.a` will return the same value, and setting `vm.a = 2` will modify `vm.$data`.
 

source/guide/installation.md

@@ -25,7 +25,7 @@ Available on [jsdelivr](//cdn.jsdelivr.net/vue/{{vue_version}}/vue.min.js) or [c
 
 ### CSP-compliant build
 
-Some environments, such as Google Chrome Apps, enforces Content Secuirty Policy (CSP) and does not allow the use of `new Function()` for evaluating expressions. In these cases you can use the [CSP-compliant build](https://github.com/yyx990803/vue/tree/csp/dist) instead.
+Some environments, such as Google Chrome Apps, enforces Content Security Policy (CSP) and does not allow the use of `new Function()` for evaluating expressions. In these cases you can use the [CSP-compliant build](https://github.com/yyx990803/vue/tree/csp/dist) instead.
 
 ## NPM