Fixed typo

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | master
| Fixed tickets | -

Author: dosten

components/dependency_injection/definitions.rst

@@ -66,7 +66,7 @@ To get an array of the constructor arguments for a definition you can use::
 or to get a single argument by its position::
 
     $definition->getArgument($index);
-    //e.g. $definition->getArguments(0) for the first argument
+    //e.g. $definition->getArgument(0) for the first argument
 
 You can add a new argument to the end of the arguments array using::