Fix typo in error message in MultipleSelectionFormField

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/MultipleSelectionFormField.class.php b/wcfsetup/install/files/lib/system/form/builder/field/MultipleSelectionFormField.class.php
index 56bca56233aa587fd12eb22f559a1ad1ca11def6..29ad395b50bfd47218855c90fa1eca53358922bd 100644 (file)
--- a/wcfsetup/install/files/lib/system/form/builder/field/MultipleSelectionFormField.class.php
+++ b/wcfsetup/install/files/lib/system/form/builder/field/MultipleSelectionFormField.class.php
@@ -111,7 +111,7 @@ class MultipleSelectionFormField extends AbstractFormField implements IFilterabl
                
                $unknownValues = array_diff($value, array_keys($this->getOptions()));
                if (!empty($unknownValues)) {
-                       throw new \InvalidArgumentException("Unknown values '" . implode("', '", $unknownValues) . '"');
+                       throw new \InvalidArgumentException("Unknown values '" . implode("', '", $unknownValues) . "'");
                }
                
                return parent::value($value);