Fix trailing whitespace, add PHPCS rule

qa-include/Q2A/Recalc/CacheClearProcess.php

@@ -38,7 +38,7 @@ class Q2A_Recalc_CacheClearProcess extends Q2A_Recalc_AbstractStep
 			$this->state->transition('docacheclear_complete');
 			return false;
 		}
-			
+
 		$deleted = $cacheDriver->clear($limit, $this->state->next, ($this->state->operation === 'docachetrim_process'));
 		$this->state->done += $deleted;
 		$this->state->next += $limit - $deleted; // skip files that weren't deleted on next iteration

qa-include/Q2A/Recalc/DeleteHiddenAnswers.php

@@ -36,7 +36,7 @@ class Q2A_Recalc_DeleteHiddenAnswers extends Q2A_Recalc_AbstractStep
 			$this->state->transition('dodeletehidden_questions');
 			return false;
 		}
-			
+
 		require_once QA_INCLUDE_DIR . 'app/posts.php';
 
 		$postid = $posts[0];

qa-include/Q2A/Recalc/ReindexContentPageReindex.php

@@ -36,7 +36,7 @@ class Q2A_Recalc_ReindexContentPageReindex extends Q2A_Recalc_AbstractStep
 			$this->state->transition('doreindexcontent_postcount');
 			return false;
 		}
-			
+
 		require_once QA_INCLUDE_DIR . 'app/format.php';
 
 		$lastpageid = max(array_keys($pages));

qa-tests/phpcs/ruleset.xml

@@ -37,4 +37,10 @@
 		</properties>
 	</rule>
 
+	<rule ref="Squiz.WhiteSpace.SuperfluousWhitespace">
+		<properties>
+			<property name="ignoreBlankLines" value="false"/>
+		</properties>
+	</rule>
+
 </ruleset>