bug #19189 [Console] Fix formatting of SymfonyStyle::comment() (chalasr)

This PR was merged into the 2.8 branch.

Discussion
----------

[Console] Fix formatting of SymfonyStyle::comment()

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #19172
| License       | MIT
| Doc PR        | n/a

This:

```php
$io->comment('Lorem ipsum dolor sit amet, consectetur adipisicing elit, <comment>sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat </comment>cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.');
```

Before outputs:

![](http://image.prntscr.com/image/1d2ea9de42024b53a77120c482be51d4.png)

After:

![](http://image.prntscr.com/image/36de23ec14b64804b0cbae7a431185be.png)

This moves the lines-cutting logic from `block()` into a specific `createBlock`, used from both `comment()` and `block()`, sort as `comment()` can take messages containing nested tags and outputs a correctly formatted block without escaping tags.

Commits
-------

0a53e1d [Console] Fix formatting of SymfonyStyle::comment()

Author: fabpot

Tests/Fixtures/Descriptor/alias_1.txt

@@ -1,3 +1,3 @@
 
- // This service is an alias for the service service_1                                                                  
+ // This service is an alias for the service service_1                                                                  
 

Tests/Fixtures/Descriptor/alias_2.txt

@@ -1,3 +1,3 @@
 
- // This service is an alias for the service service_2                                                                  
+ // This service is an alias for the service service_2