Fix gitignore
minor #10377 [HttpKernel] Fix gitignore (florianv)

This PR was submitted for the 2.4-dev branch but it was merged into the 2.4 branch instead (closes #10377).

Discussion
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[HttpKernel] Fix gitignore

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

The kernel rootDir is Fixtures:

https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/Tests/KernelTest.php#L787-L789

https://github.com/symfony/symfony/blob/master/src/Symfony/Component/HttpKernel/Tests/KernelTest.php#L800-L802

Commits
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9980ba2 [HttpKernel] Fix gitignore
Use more accurate variable name
minor #10407 [Security] Use more accurate variable name (lyrixx)

This PR was submitted for the 2.4-dev branch but it was merged into the 2.4 branch instead (closes #10407).

Discussion
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[Security] Use more accurate variable name

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

Sorry for the noise, but everytime I open this class, I wonder what is `$exception`.

Commits
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f34e716 [Security] Use more accurate variable name