How to put a line in the middle of the text

Hello guys,
im current working in a project that you have to take a few steps to achiev the goal, i was hopping to use something like (<)strike(>)(</)strike(>) in html to make the “todo” list more friendly. I was searching in the web, and i found GUIStyle, but i have no idea how to reproduce that effect.

Thank you guys very much,

PS: like this → this is striked

Or this (bit hacky and requires fiddling to get the spacing right)

void OnGUI()
	GUI.Label(new Rect(0,0,200,20),"HI THERE");
	GUI.Label(new Rect(0,0,200,20),"----------------");