Turn characters like ?, @, # to hyphen instead of just removing them

[rightaway]

Right now aaa??@#bbb becomes aaabbb, generated slug would be more readable if it were to become aaa-bbb.

[ghost]

why the hell is there aaa??@#bb in slug ??

are-you-crazy-----

[rightaway]

@phuyem It's simply an example.

[kokokurak]

+1 for this! There should always be separator for any removed/replaced characters. Another example:

aaa&&&&bbb

Turns into:

aaaandandaaa

But I believe the better result would be this:

aaa-and-and-and-and-bbb