NOTE This was cross-posted on the Google Docs official help forum: https://productforums.google.com/forum/#!topic/docs/H24s-PNTn1E
I've been using Google Docs for a quite long time and today I noticed that the behaviour of those documents has changed.
When you have text like:
M
M
And copy & paste that text into a text editor like Notepad. The text is separated by two lines:
M
M
This has affected old files as well as new ones.
This has been tested on Windows 10 with Chrome and on Mac Os (El Captain) with Chrome. Tried both on normal and incognito tabs.