Merge pull request #41 from dotkernel/arhimede

added DotKernel API version 4

Author: arhimede

docs/book/v4/installation/test-the-installation.md

@@ -2,7 +2,7 @@
 
 Sending a GET request to the [home page](http://0.0.0.0:8080/) should output the following message:
 
-> {"message": "Welcome to DotKernel API!"}
+> {"message": "DotKernel API version 4"}
 
 ## Old way of doing things, using PHP built-in server
 
@@ -12,7 +12,8 @@ php -S 0.0.0.0:8080 -t public
 
 ## Running tests
 
-The project has 2 types of tests: functional and unit tests, you can run both types at the same type by executing this command:
+The project has 2 types of tests: functional and unit tests, you can run both types at the same type by executing this
+command:
 
 ```shell
 php vendor/bin/phpunit