Generic/IncrementDecrementSpacing: improve test coverage

Adds tests for for using pre/post-incrementors with an object
property accessed through a method call. Including one test with a
newline between the object property accessed through a method call and a
post-increment operator to test a fix in a previous commit.

Author: rodrigoprimo

src/Standards/Generic/Tests/WhiteSpace/IncrementDecrementSpacingUnitTest.inc

@@ -35,3 +35,9 @@ $obj->prop['key'] ++;
 
 --ClassName::$prop;
 -- ClassName::$prop;
+
+++getObject()->count;
+++ getObject()->count;
+getObject()->count++;
+getObject()->count
+++;

src/Standards/Generic/Tests/WhiteSpace/IncrementDecrementSpacingUnitTest.inc.fixed

@@ -34,3 +34,8 @@ $obj->prop['key']++;
 
 --ClassName::$prop;
 --ClassName::$prop;
+
+++getObject()->count;
+++getObject()->count;
+getObject()->count++;
+getObject()->count++;

src/Standards/Generic/Tests/WhiteSpace/IncrementDecrementSpacingUnitTest.php

@@ -53,6 +53,8 @@ public function getErrorList($testFile='')
             $errors[31] = 1;
             $errors[34] = 1;
             $errors[37] = 1;
+            $errors[40] = 1;
+            $errors[43] = 1;
 
             return $errors;