…ss (jvasseur)

This PR was merged into the 4.3-dev branch.

Discussion
----------

[Console] Add an iterate method to the ProgressBar class

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        | symfony/symfony-docs#10949

Add an iterate method to the `ProgressBar` class that simplify updating the progress bar when iterating over an `iterable`.

Before:
```php
$bar->start();
foreach ($iterable as $value) {
    // Process $value

    $bar->advance();
}
$bar->finish();
```

After:
```php
foreach ($bar->iterate($iterable) as $value) {
    // Process $value
}
```

Additionally if `$iterable` is countable, the progress bar max step will automatically set to its count. If it isn't countable, nothing is done (instead of setting it to 0) to allow passing a max independently before calling `iterate`.

I will try to do the doc PR soon.

Commits
-------

eb35531 Add an iterate method to the ProgressBar class

… method (jvasseur)

This PR was merged into the master branch.

Discussion
----------

[Console] Add documentation for the ProgressBar::iterate method

Doc PR for symfony/symfony#29753

Commits
-------

5c0b716 [Console] Add documentation for the ProgressBar::iterate method