Reflow jumbles separate lines together about autoflow

[joallard]

This is also the case for YAML:

Before:

key:
  other_key:
    This is a paragraph with some text that will make it go over the line of 80 characters. It is a paragraph, and we want it to be separate from the heading.  # <= cursor here, cmd-alt-q

After:

key: other_key: This is a paragraph with some text that will make it go over the
line of 80 characters. It is a paragraph, and we want it to be separate from the
heading.

[aleb]

Another example:

**asdf sdfa** sdf asdf asd fsad fasd fsdf asdf asdf asdf asd fasdf a asdf dsfa af ads adsf 

After cmd+alt+q:

**asdf sdfa** sdf asdf asd fsad fasd fsdf asdf asdf asdf asd fasdf a asdf dsfa
**af ads adsf 

[daviwil]

This issue was moved to atom/atom#18020