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

Remove decoration from frameworkbundle test (avoid testing the Console behaviour)
Set background to default

Test output

Adapt test for FrameworkBundle

Use Helper::strlenWithoutDecoration rather than Helper::strlen(strip_tags(..))

Improve logic for align all lines to the first in block()

Tests more block() possible outputs

Avoid calling Helper::strlenWithoutDecoration in loop for prefix, assign it instead

Author: chalasr

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