smart Corrector::match

[dbaltas]

The current implementation of Corrector::match currently used in HelpCommand::execute is quite naive since it is only based on php's native similar_text.

Consider making it smarter.

The idea occurred after

$ phpbrew uninstall php-7.0.15
Did you mean 'install'? [Y/n]

Where one presses Yes (or at least I did) without second thought.

I would expect Corrector::match to say "Did you mean 'remove'? [Y/n]".

If this is a direction you would like to go towards, I would be happy to provide a first implementation.

[c9s]

Sure! If you have any plan can improve this, any implementation is welcomed. :)