fixed linting

Signed-off-by: arhimede <julian@dotkernel.com>

Author: claurospace

docs/book/v5/core-features/dependency-injection.md

@@ -4,13 +4,14 @@ Dependency Injection is a design pattern used in software development to impleme
 terms is the act of providing dependencies for an object during instantiation.
 
 In PHP, dependency injection can be implemented in various ways, including through constructor injection,
-setter injection, and property injection. 
+setter injection, and property injection.
 
 DotKernel API, through it's
 [dot-dependency-injection](https://github.com/dotkernel/dot-dependency-injection) package focuses only on constructor
 injection.
 
 ## Usage
+
 DotKernel API comes out of the box with [dot-dependency-injection](https://github.com/dotkernel/dot-dependency-injection)
 package, which provide all we need for injecting dependencies in any object you want.