Comment on multiple lines with empty in the middle

Hello, 

Let's say I have multi-line codes like below:

line 1 code

line 2 code

line 3 code

line 4 code

when I select the whole 5 lines (including the empty line between line 2 and line 3, then transfer to comment by [cmd + / ] it will be like:

# line 1 code

# line 2 code

#

# line 3 code

# line 4 code

I was hoping that the empty line will not be automatically added with the '#'.

I couldn't find anywhere to set it this way.