Are lines what differ machine code programming in a text editor from in memory directly?


I understand that at least theoretically a human could do programming with a given type of machine code in a text editor OR in the memory directly somehow.

I also understand that in a (human invented?) computer memory, in each cell, data is sequential, scattered in addresses each of which contains a word in a fixed size which always contain bit/s to a full capacity.

I am not sure what would theoretically differ machine code programming in a text editor from machine code programming in memory directly; perhaps the very usage of lines ("the absence of sequence", I guess) as available in text editors, is the answer.