This PR was merged into the 2.3 branch.

Discussion
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Fixing wrong variable name from #13519

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #13519
| License       | MIT
| Doc PR        | n/a

Hi guys!

I'm currently seeing an undefined variable in the `PhpDumper` on all branches. I think it was added inadvertently in #13519, so unless I'm totally missing something, this should be an easy merge.

Thanks!

Commits
-------

3ae52ed Fixing wrong variable name from #13519

… unit tests (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[DependencyInjection] `ResolveParameterPlaceHoldersPass` unit tests

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

When working #13924, I noticed that there were no tests for the `ResolveParameterPlaceHoldersPass` class. So I decided to add them for the `2.3` branch too.

Commits
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b8d42b3 `ResolveParameterPlaceHoldersPass` unit tests

…udad)

This PR was merged into the 2.6 branch.

Discussion
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[translation][initialize cache] Remove dead code.

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

I see two issues here:
1- initialize function doesn't exist in Translator class.
2- initializeCacheCatalogue is only called when cache is not null

Commits
-------

bc066fb [translation][initialize cache] Remove dead code.

* 2.3:
  `ResolveParameterPlaceHoldersPass` unit tests
  Fixing wrong variable name from #13519

* 2.6:
  `ResolveParameterPlaceHoldersPass` unit tests
  Fixing wrong variable name from #13519
  [translation][initialize cache] Remove dead code.

Conflicts:
	src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php