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[symfony#2292] Expanding section about the single command that shows and explains how to override the getDefinition method

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Original file line number	Diff line number	Diff line change
`@@ -85,8 +85,8 @@ You also need to create the file to run at the command line which creates`
`85`	`85`	an ``Application`` and adds commands to it::
`86`	`86`
`87`	`87`	`#!/usr/bin/env php`
`88`		`- # app/console`
`89`	`88`	`<?php`
	`89`	`+ // app/console`
`90`	`90`
`91`	`91`	`use Acme\DemoBundle\Command\GreetCommand;`
`92`	`92`	`use Symfony\Component\Console\Application;`

Lines changed: 23 additions & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -43,12 +43,32 @@ it is possible to remove this need by extending the application::`
`43`	`43`
`44`	`44`	`return $defaultCommands;`
`45`	`45`	`}`
	`46`	`+`
	`47`	`+ /**`
	`48`	`+ * Overridden so that the application doesn't expect the command`
	`49`	`+ * name to be the first argument.`
	`50`	`+ */`
	`51`	`+ public function getDefinition()`
	`52`	`+ {`
	`53`	`+ $inputDefinition = parent::getDefinition();`
	`54`	`+ // clear out the normal first argument, which is the command name`
	`55`	`+ $inputDefinition->setArguments();`
	`56`	`+`
	`57`	`+ return $inputDefinition;`
	`58`	`+ }`
`46`	`59`	`}`
`47`	`60`
`48`	`61`	When calling your console script, the command `MyCommand` will then always
`49`	`62`	`be used, without having to pass its name.`
`50`	`63`
`51`		`-..note::`
	`64`	`+You can also simplify how you execute the application::`
	`65`	`+`
	`66`	`+ #!/usr/bin/env php`
	`67`	`+ <?php`
	`68`	`+ // command.php`
	`69`	`+`
	`70`	`+ use Acme\Tool\MyApplication;`
	`71`	`+`
	`72`	`+ $application = new MyApplication();`
	`73`	`+ $application->run();`
`52`	`74`
`53`		`- If your command accepts one or more arguments, you may also want to override`
`54`		- the:method:`Symfony\\Component\\Console\\getDefaultInputDefinition` method.

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