it is not quite that simple. first, that line of text is different depending on whether the viewer is logged in or not.
also, if you make this change in the template file then you have to remember to do it again every time you update phpbb.
or, you have to create a custom style just for this one little change.
I would suggest that you don't bother, nobody but you will care about this or even know that you made this change.
I am going to be out of town and off line for a week . see ya when I get back.
Premium phpBB 3.2 Styles
If a tree falls in the forest and nobody is there, does it make a sound?