`this` is a keyword, not a variable

In the `Functions` page, in the `this and arrow functions` section, we can read:
```
In JavaScript, this is a variable that’s set when a function is called.
```
This is wrong. The [Standard ECMA-262, clause 12.2.2](https://www.ecma-international.org/ecma-262/11.0/index.html#sec-this-keyword) couldn't be more explicit:
```
12.2.2 The this Keyword
```
This is a keyword, not a variable.