Hide AMPscript in Content Builder or Cloud Pages editor

When you're not doing send previews, big AMPscript code blocks can make your email un-readable. You can easily hide a block using the following :

<!== ==>

But if you save this one into a free form this might transform it but still hide the code.

You can also do the following

%%[
/* My ampscript comment that describes the block <div style="display:none"> */
here goes the code
/*</div>*/ 
]%%