Arabic formatting

Hi guys @javascript-tutorial/translate-ar,

I found a bunch of errors in formatting, so here's a small note.

1) The quote type matters: a backtick \` should remain backtick \`. If there are multiple backticks, please keep exactly the same number.
2) In `header=...` and `src=...` - please, no spaces around `=` (`src = "..."` is wrong, `src="..."` is ok)
3) Please, use https://github.com/javascript-tutorial/server to preview your translation.

I fixed some obvious problems, but there must be more, only preview can help to make sure it's ok.