How do you "cross out" elements?

From, click "Take the Tour" which will lead you to

In Step 3, the instructions say to “…cross out the ‘password’ element…”.

Does this imply that Yii supports formatted source files? How do you “cross out” elements? Commenting the line would work but that’s not the same thing.

Just delete the line.

Deleting the line is similar to commenting the line but it is still not "crossing out" the line.

Perhaps an IDE feature? :rolleyes:

That’s what I was wondering too, but which one? Not any I’ve used. Also, how would Yii understand strikethrough?