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Update 01_Error_Handling.md

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Add use statements in initial code sample for completeness and hopefully avoid errors when code is copy & pasted
Add a 'be' to dependency injection paragraph so it reads properly
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docs/en/02_Developer_Guides/07_Debugging/01_Error_Handling.md
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@ -15,6 +15,8 @@ can be accessed via the `Injector`:
```php
use SilverStripe\Core\Injector\Injector;
use Psr\Log\LoggerInterface;
use SilverStripe\Security\Security;
Injector::inst()->get(LoggerInterface::class)->info('User has logged in: ID #' . Security::getCurrentUser()->ID);
Injector::inst()->get(LoggerInterface::class)->debug('Query executed: ' . $sql);
@ -55,7 +57,7 @@ throw new \LogicException("Query failed: " . $sql);
### Accessing the logger via dependency injection.
It can quite verbose to call `Injector::inst()->get(LoggerInterface::class)` all the time. More importantly,
It can be quite verbose to call `Injector::inst()->get(LoggerInterface::class)` all the time. More importantly,
it also means that you're coupling your code to global state, which is a bad design practise. A better
approach is to use depedency injection to pass the logger in for you. The [Injector](../extending/Injector)
can help with this. The most straightforward is to specify a `dependencies` config setting, like this: