1.5 interval in text

[Dragonpol]

Could anyone tell me which CSS class defines 1.5 interval in the post message box? When I type a message and press ENTER I don't need these 1.5 intervals in text. (I know that one can simply press SHIFT+ENTER but still)

Thanks

[Navigare]

Anyone? I'd like to know as well.  

[Arai]

This? https://community.invisionpower.com/topic/418516-remove-gap-between-lines-of-text/