Remove useless curly braces around svn args

src/Composer/Repository/Vcs/SvnDriver.php

@@ -310,7 +310,7 @@ class SvnDriver extends VcsDriver
         $processExecutor = new ProcessExecutor($io);
 
         $exit = $processExecutor->execute(
-            "svn info --non-interactive ".ProcessExecutor::escape('{'.$url.'}'),
+            "svn info --non-interactive ".ProcessExecutor::escape($url),
             $ignoredOutput
         );