phrase-meaning
Source: Embedded Content: Video, Audio, and Canvas
This will play the video on page load, won’t display any controls, and will most likely annoy the hell out of your visitors. Of course you could, if you were kind, put in both the controls and autoplay attributes.
What does "annoy the hell out of somebody" mean? I guess it just means "annoy somebody". I wonder how can that phrase be logically explained?
The construction
(verb) + it out
can be used to emphasize a verb in the sense to do that verb more, to do it until its maximum capacity, or to do it completely. So your example means
use more spaces
In other words, it means exactly what the first part says
Use spaces liberally throughout your code
There are other examples:
Talk it out
To talk until you are satisfied, or until you express all your burdensome emotions
Work it out
To work on a problem until it is finished or fixed
Stretch it out
To stretch something, like a muscle until it is warmed up, or a rubberband until it is about to break
Stick it out
To continue to do something to its end
There are other examples.
Further, the meaning I gave is not strict. Here is a special case.
It means to stop something completely. For example, if you are trying to study, but your little brother or sister keeps asking you to play, you might tell him or her "Cut it out!"
a snaking line
looks and moves like a snake
Best Answer
It's simply idiomatic.
So in the OP
This version is polite. The original is somewhat crude but feels more emphatic. For instance, imagine that you are a visitor to that page and you become very annoyed (pissed, in American slang). If you have no problems swearing (hell is a mild swear), then you might say this page is annoying the hell out of me! [= This is really, really annoying me!].
Note that the meaning the hell out of can differ depending on the context.
This would mean let's leave fast/quickly.
One more example: Dad Trolls The Hell Out Of His Daughter’s Selfies
Here, the meaning is something like dad thoroughly makes fun of his daughter's selfies or dad does a good job of making fun of his daughter's selfies.