minor #25870 Formatting fix in upgrade 3.0 document (Piotr Błasiak)
minor #25870 Formatting fix in upgrade 3.0 document (Piotr Błasiak)

This PR was merged into the 2.8 branch.

Discussion
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Formatting fix in upgrade 3.0 document

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

Fixes formatting in upgrade file.
This fix was already done in https://github.com/symfony/symfony/pull/22436 but applied to 3.2.
Formatting error still exists in 2.8, 3.0, 3.1. I don't know if this was intentional.

Commits
-------

dc6d5e1083 Formatting fix in upgrade 3.0 document

mpdude/symfony,Simperfit/symfony,OndraM/symfony,curry684/symfony,d-ph/symfony,romaricdrigon/symfony,joelwurtz/symfony,dmaicher/symfony,michaelperrin/symfony,jakzal/symfony,sgehrig/symfony,jderusse/symfony,oleg-andreyev/symfony,Koc/symfony,gonzalovilaseca/symfony,deguif/symfony,e-moe/symfony,e-moe/symfony,Koc/symfony,oleg-andreyev/symfony,tucksaun/symfony,dmaicher/symfony,stof/symfony,garak/symfony,alekitto/symfony,zorn-v/symfony,fabpot/symfony,Deamon/symfony,OndraM/symfony,Einenlum/symfony,yceruto/symfony,HeahDude/symfony,andrerom/symfony,sgehrig/symfony,lyrixx/symfony,bendavies/symfony,OskarStark/symfony,fabpot/symfony,arjenm/symfony,OndraM/symfony,derrabus/symfony,mnapoli/symfony,weaverryan/symfony,damienalexandre/symfony,alekitto/symfony,shieldo/symfony,phramz/symfony,c960657/symfony,sroze/symfony,SaschaDens/symfony,curry684/symfony,MatTheCat/symfony,smatyas/symfony,c960657/symfony,jvasseur/symfony,docteurklein/symfony,HeahDude/symfony,Tobion/symfony,ragboyjr/symfony,jderusse/symfony,Koc/symfony,SaschaDens/symfony,stof/symfony,mpdude/symfony,Simperfit/symfony,gnat42/symfony,teohhanhui/symfony,mnapoli/symfony,mweimerskirch/symfony,xabbuh/symfony,garak/symfony,OndraM/symfony,OskarStark/symfony,mnapoli/symfony,andreia/symfony,gonzalovilaseca/symfony,vincentaubert/symfony,iltar/symfony,apetitpa/symfony,yceruto/symfony,mnapoli/symfony,jean-gui/symfony,vincentaubert/symfony,MatTheCat/symfony,curry684/symfony,phramz/symfony,Slamdunk/symfony,apetitpa/symfony,d-ph/symfony,michaelperrin/symfony,ragboyjr/symfony,gonzalovilaseca/symfony,damienalexandre/symfony,hhamon/symfony,Deamon/symfony,zcodes/symfony,e-moe/symfony,voronkovich/symfony,ro0NL/symfony,tgalopin/symfony,symfony/symfony,derrabus/symfony,iltar/symfony,jvasseur/symfony,frankdejonge/symfony,curry684/symfony,Tobion/symfony,voronkovich/symfony,Slamdunk/symfony,ajgarlag/symfony,yceruto/symfony,ajgarlag/symfony,nicolas-grekas/symfony,hhamon/symfony,maidmaid/symfony,jean-gui/symfony,shieldo/symfony,gnat42/symfony,andrerom/symfony,yceruto/symfony,kbond/symfony,paradajozsef/symfony,stof/symfony,andrerom/symfony,tucksaun/symfony,tucksaun/symfony,frankdejonge/symfony,weaverryan/symfony,deguif/symfony,pamil/symfony,docteurklein/symfony,SaschaDens/symfony,nicolas-grekas/symfony,Taluu/symfony,garak/symfony,Deamon/symfony,pyrech/symfony,ragboyjr/symfony,weaverryan/symfony,mihai-stancu/symfony,lyrixx/symfony,e-moe/symfony,fabpot/symfony,zcodes/symfony,gonzalovilaseca/symfony,mihai-stancu/symfony,chalasr/symfony,gimler/symfony,MatTheCat/symfony,fabpot/symfony,docteurklein/symfony,Pierstoval/symfony,lyrixx/symfony,pyrech/symfony,pierredup/symfony,iltar/symfony,HeahDude/symfony,joelwurtz/symfony,nasimnabavi/symfony,sroze/symfony,lyrixx/symfony,bendavies/symfony,zorn-v/symfony,c960657/symfony,hhamon/symfony,pierredup/symfony,deguif/symfony,hacfi/symfony,docteurklein/symfony,derrabus/symfony,pamil/symfony,gnat42/symfony,tucksaun/symfony,sroze/symfony,dmaicher/symfony,Taluu/symfony,SaschaDens/symfony,teohhanhui/symfony,Slamdunk/symfony,jderusse/symfony,ogizanagi/symfony,mihai-stancu/symfony,Nyholm/symfony,Pierstoval/symfony,mweimerskirch/symfony,symfony/symfony,Nyholm/symfony,symfony/symfony,c960657/symfony,1ed/symfony,zerkms/symfony,zerkms/symfony,pyrech/symfony,docteurklein/symfony,nasimnabavi/symfony,smatyas/symfony,HeahDude/symfony,deguif/symfony,alekitto/symfony,Nyholm/symfony,ogizanagi/symfony,teohhanhui/symfony,damienalexandre/symfony,tgalopin/symfony,Einenlum/symfony,ragboyjr/symfony,mweimerskirch/symfony,maidmaid/symfony,localheinz/symfony,jderusse/symfony,pamil/symfony,arjenm/symfony,gimler/symfony,nasimnabavi/symfony,vincentaubert/symfony,Einenlum/symfony,ajgarlag/symfony,Koc/symfony,andreia/symfony,paradajozsef/symfony,Deamon/symfony,bendavies/symfony,xabbuh/symfony,zcodes/symfony,OndraM/symfony,hacfi/symfony,kbond/symfony,nicolas-grekas/symfony,chalasr/symfony,phramz/symfony,OskarStark/symfony,Tobion/symfony,shieldo/symfony,joelwurtz/symfony,paradajozsef/symfony,mpdude/symfony,pierredup/symfony,gimler/symfony,Taluu/symfony,romaricdrigon/symfony,mweimerskirch/symfony,gimler/symfony,jakzal/symfony,romaricdrigon/symfony,Pierstoval/symfony,sgehrig/symfony,apetitpa/symfony,xabbuh/symfony,d-ph/symfony,d-ph/symfony,pyrech/symfony,zcodes/symfony,sroze/symfony,teohhanhui/symfony,jean-gui/symfony,Pierstoval/symfony,pierredup/symfony,phramz/symfony,lstrojny/symfony,ro0NL/symfony,sgehrig/symfony,Simperfit/symfony,Deamon/symfony,voronkovich/symfony,MatTheCat/symfony,ajgarlag/symfony,localheinz/symfony,pamil/symfony,andreia/symfony,ogizanagi/symfony,nicolas-grekas/symfony,garak/symfony,localheinz/symfony,OskarStark/symfony,hhamon/symfony,chalasr/symfony,jean-gui/symfony,tgalopin/symfony,jakzal/symfony,gnat42/symfony,mweimerskirch/symfony,hacfi/symfony,maidmaid/symfony,smatyas/symfony,frankdejonge/symfony,andreia/symfony,Simperfit/symfony,nasimnabavi/symfony,tgalopin/symfony,zorn-v/symfony,iltar/symfony,derrabus/symfony,1ed/symfony,smatyas/symfony,shieldo/symfony,mpdude/symfony,lstrojny/symfony,joelwurtz/symfony,maidmaid/symfony,stof/symfony,michaelperrin/symfony,mihai-stancu/symfony,andrerom/symfony,kbond/symfony,Einenlum/symfony,chalasr/symfony,symfony/symfony,frankdejonge/symfony,ro0NL/symfony,michaelperrin/symfony,zerkms/symfony,bendavies/symfony,ro0NL/symfony,1ed/symfony,oleg-andreyev/symfony,jvasseur/symfony,vincentaubert/symfony,apetitpa/symfony,dmaicher/symfony,ogizanagi/symfony,mnapoli/symfony,paradajozsef/symfony,zerkms/symfony,Nyholm/symfony,mihai-stancu/symfony,xabbuh/symfony,Simperfit/symfony,Tobion/symfony,Slamdunk/symfony,arjenm/symfony,jvasseur/symfony,voronkovich/symfony,alekitto/symfony,localheinz/symfony,arjenm/symfony,jakzal/symfony,SaschaDens/symfony,romaricdrigon/symfony,zorn-v/symfony,1ed/symfony,lstrojny/symfony,damienalexandre/symfony,oleg-andreyev/symfony,weaverryan/symfony,Taluu/symfony,kbond/symfony,smatyas/symfony