Testing [Question and answer preview is wrongly rendering some Markdown](https://meta.stackexchange.com/q/354281/289905)

Preview:

[![Looks totally different. There are no headers at all.][1]][1]

Post:

header
=)

header
=)
header
=)

header 
=)

header 
=)
header 
=)

header  
=)

header  
=)
header  
=)

header
 =)

header
 =)
header
 =)

header
 -.

header
 -.
header
 -.

not header
 .--------

list?
  - d
-4


Quick test: https://stackoverflow.com/questions/7353718/why-are-my-br-tags-getting-converted-to-ltbr-gt


  [1]: https://i.sstatic.net/OEBTg.png