Few fixes

Author: petr-buchin

src/Write/Model/ReplaceOne.php

@@ -39,7 +39,7 @@ public function __construct($filter, $replacement, array $options = [])
             throw new InvalidArgumentException(
                 sprintf(
                     '$replacement must be an array or an object, %s given',
-                    TypeUtil::getType($filter)
+                    TypeUtil::getType($replacement)
                 )
             );
         }

src/Write/Model/Traits/EnsureValidUpdateTrait.php

@@ -28,8 +28,6 @@ public static function ensureValidUpdate($update)
             throw new InvalidArgumentException('$update cannot be empty');
         }
 
-
-
         try {
             self::getUpdateResolver()->resolve($update);
         } catch(OptionsResolverException $e) {

src/Write/Model/UpdateMany.php

@@ -24,7 +24,7 @@ public function __construct($filter, $update, array $options = [])
         $options += ['multi' => true];
 
         $options = UpdateOptions::resolve($options);
-        if (isset($options['multi']) && !$options['multi']) {
+        if (isset($options['multi']) && false === $options['multi']) {
             throw new InvalidArgumentException(
                 'UpdateMany operation does not allow option "multi" to be false'
             );