Merge pull request #632 from igorw/no-suggest-installed

Do not suggest packages that were installed

src/Composer/Installer.php

@@ -154,8 +154,10 @@ class Installer
 
         // output suggestions
         foreach ($this->suggestedPackages as $suggestion) {
+            if (!$installedRepo->findPackages($suggestion['target'])) {
                 $this->io->write($suggestion['source'].' suggests installing '.$suggestion['target'].' ('.$suggestion['reason'].')');
             }
+        }
 
         if (!$this->dryRun) {
             // write lock