named arguments -> named parameters

inspired by http://stackoverflow.com/questions/38072740/es6-arrow-function-no-duplicate-named-arguments

Author: bergus

manuscript/03-Functions.md

@@ -786,8 +786,8 @@ One of the most interesting new parts of ECMAScript 6 is the *arrow function*. A
 * **Cannot be called with `new`** - Arrow functions do not have a `[[Construct]]` method and therefore cannot be used as constructors. Arrow functions throw an error when used with `new`.
 * **No prototype** - since you can't use `new` on an arrow function, there's no need for a prototype. The `prototype` property of an arrow function doesn't exist.
 * **Can't change `this`** - The value of `this` inside of the function can't be changed. It remains the same throughout the entire lifecycle of the function.
-* **No `arguments` object** - Since arrow functions have no `arguments` binding, you must rely on named and rest parameters to access function arguments..
-* **No duplicate named arguments** - arrow functions cannot have duplicate named arguments in strict or nonstrict mode, as opposed to nonarrow functions that cannot have duplicate named arguments only in strict mode.
+* **No `arguments` object** - Since arrow functions have no `arguments` binding, you must rely on named and rest parameters to access function arguments.
+* **No duplicate named parameters** - arrow functions cannot have duplicate named parameters in strict or nonstrict mode, as opposed to nonarrow functions that cannot have duplicate named parameters only in strict mode.
 
 There are a few reasons for these differences. First and foremost, `this` binding is a common source of error in JavaScript. It's very easy to lose track of the `this` value inside a function, which can result in unintended program behavior, and arrow functions eliminate this confusion. Second, by limiting arrow functions to simply executing code with a single `this` value, JavaScript engines can more easily optimize these operations, unlike regular functions, which might be used as a constructor or otherwise modified.