feature #26682 Improved the lint:xliff command (javiereguiluz)
feature #26682 Improved the lint:xliff command (javiereguiluz)

This PR was squashed before being merged into the 4.1-dev branch (closes #26682).

Discussion
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Improved the lint:xliff command

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #26537
| License       | MIT
| Doc PR        | -

This is how it looks:

![lint-xliff-output](https://user-images.githubusercontent.com/73419/37958502-fd8732e0-31b0-11e8-8688-8644ca930daf.png)

Commits
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6bbcc45d96 Improved the lint:xliff command

symfony/framework-bundle