Fixed again the version parser regexp

Author: javiereguiluz

src/Symfony/Installer/NewCommand.php

@@ -111,7 +111,7 @@ protected function checkSymfonyVersionIsInstallable()
         }
 
         // validate semver syntax
-        if (!preg_match('/^2\.\d(?:\.\d{1,2})?|2\.\d(?:-(?:dev|BETA\d*|RC\d*))$/i', $this->version)) {
+        if (!preg_match('/^2\.\d(?:\.\d{1,2})?(?:-(?:dev|BETA\d*|RC\d*))?$/i', $this->version)) {
             throw new \RuntimeException('The Symfony version must be 2.N or 2.N.M (where N and M are positive integers). The special "-dev", "-BETA" and "-RC" versions are also supported.');
         }
 

tests/Symfony/Installer/Tests/IntegrationTest.php

@@ -109,15 +109,9 @@ public function provideSymfonyInstallationData()
 
             array(
                 '2.7-BETA1',
-                '/.*Symfony 2\.7\-BETA1 was successfully installed.*/',
+                '/.*Symfony 2\.7\.0\-BETA1 was successfully installed.*/',
                 '/Symfony version 2\.7\-BETA1 - app\/dev\/debug/',
             ),
-
-            array(
-                '2.7-RC1',
-                '/.*Symfony 2\.7\-RC1 was successfully installed.*/',
-                '/Symfony version 2\.7\-RC1 - app\/dev\/debug/',
-            ),
         );
     }
 }