added DotKernel API version 4 string in documentation

Author: arhimede

LICENSE

@@ -12,8 +12,6 @@ furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 
-
-
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

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