Fix output

src/Composer/DependencyResolver/Operation/UpdateOperation.php

@@ -75,6 +75,6 @@ class UpdateOperation extends SolverOperation
     public function __toString()
     {
         return 'Updating '.$this->initialPackage->getPrettyName().' ('.$this->initialPackage->getPrettyVersion().') to '.
-            $this->targetPackage->getPrettyName(). '('.$this->targetPackage->getPrettyVersion().')';
+            $this->targetPackage->getPrettyName(). ' ('.$this->targetPackage->getPrettyVersion().')';
     }
 }