Reenable documentation sniffs

Keep silencing the sniffs in tests to reduce noise. (That exclusion
could be kept indefinitely, or addressed later)

Bug: T330644
Change-Id: Ie54947ebd3650976c0c5569408e690ad9b039e38

Author: codders

src/Diff/ItemDiffer.php

@@ -62,7 +62,7 @@ private function assertIsItemAndCast( EntityDocument $item ): Item {
 		return $item;
 	}
 
-	public function diffItems( Item $from, Item $to ) {
+	public function diffItems( Item $from, Item $to ): ItemDiff {
 		$diffOps = $this->recursiveMapDiffer->doDiff(
 			$this->toDiffArray( $from ),
 			$this->toDiffArray( $to )

src/Diff/PropertyDiffer.php

@@ -62,7 +62,7 @@ private function assertIsPropertyAndCast( EntityDocument $property ): Property {
 		return $property;
 	}
 
-	public function diffProperties( Property $from, Property $to ) {
+	public function diffProperties( Property $from, Property $to ): EntityDiff {
 		$diffOps = $this->diffPropertyArrays(
 			$this->toDiffArray( $from ),
 			$this->toDiffArray( $to )

src/EntityId/InMemoryEntityIdPager.php

@@ -50,10 +50,12 @@ public function fetchIds( $limit ) {
 		return $entityIds;
 	}
 
+	/** @inheritDoc */
 	public function getPosition() {
 		return $this->offset;
 	}
 
+	/** @inheritDoc */
 	public function setPosition( $position ) {
 		$this->offset = $position;
 	}

src/Lookup/InMemoryEntityLookup.php

@@ -104,10 +104,12 @@ private function throwExceptionIfNeeded( EntityId $entityId ) {
 		}
 	}
 
+	/** @inheritDoc */
 	public function getItemForId( ItemId $itemId ) {
 		return ( new LegacyAdapterItemLookup( $this ) )->getItemForId( $itemId );
 	}
 
+	/** @inheritDoc */
 	public function getPropertyForId( PropertyId $propertyId ) {
 		return ( new LegacyAdapterPropertyLookup( $this ) )->getpropertyForId( $propertyId );
 	}