issue2551094 - simplemde now handles linebreaks like markdown backends Single newlines in simplemde editor were not being displayed with hard linebreaks. Original patch changed Markdown and Markdown2 backends to implement non-standard hard linebreak on embedded newline. Mistune does not support that without having to write a new plugin. Rather than changing the backends, change the simplemde frontend call to not support github flavored markdown support where newline is the same as having two trailing spaces followed by a newline (markdown standard for embedding a linebreak).

--- a/CHANGES.txt	Thu Oct 22 20:43:29 2020 -0400
+++ b/CHANGES.txt	Fri Oct 23 18:38:37 2020 -0400
@@ -36,6 +36,9 @@
   cheeseshop.  (John Rouillard)
 - issue2551093 - return plain text if markdown formatter throws exception
   (reported by Cedric Krier, fix by John Rouillard)
+- issue2551094 - make simplemde handle line breaks the same as the
+  backend markdown formmatters. (report: Cedric Krier, patch: Christof
+  Meerwald) 
 
 Features:
 - issue2550522 - Add 'filter' command to command-line