minor symfony#24473 [DX][FrameworkBundle] Clarify where to find exceptions for non-registered commands (sroze)

This PR was merged into the 3.4 branch.

Discussion
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[DX][FrameworkBundle] Clarify where to find exceptions for non-registered commands

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ø
| License       | MIT
| Doc PR        | ø

As a developer, when I saw "Some commands could not be registered." displayed on my console... it wasn't clear ether the next displayed exception was related to this or not. Just adding a reference to the "following errors" would help.

Commits
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427212d Clarify the exceptions are going to be rendered just after

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/Console/Application.php

@@ -190,7 +190,7 @@ private function renderRegistrationErrors(InputInterface $input, OutputInterface
             $output = $output->getErrorOutput();
         }
 
-        (new SymfonyStyle($input, $output))->warning('Some commands could not be registered.');
+        (new SymfonyStyle($input, $output))->warning('Some commands could not be registered:');
 
         foreach ($this->registrationErrors as $error) {
             $this->doRenderException($error, $output);

src/Symfony/Bundle/FrameworkBundle/Tests/Console/ApplicationTest.php

@@ -160,7 +160,7 @@ public function testRunOnlyWarnsOnUnregistrableCommand()
         $output = $tester->getDisplay();
 
         $this->assertSame(0, $tester->getStatusCode());
-        $this->assertContains('Some commands could not be registered.', $output);
+        $this->assertContains('Some commands could not be registered:', $output);
         $this->assertContains('throwing', $output);
         $this->assertContains('fine', $output);
     }