markdown: use hardbreaks to be consistent with previous behaviour of markdown generated content

rhodecode/lib/markup_renderer.py

@@ -198,7 +198,7 b' def get_markdown_renderer_flavored(exten'
 
     class GFM(object):
         def convert(self, source):
-            with pycmarkgfm.parse_gfm(source) as document:
+            with pycmarkgfm.parse_gfm(source, options=pycmarkgfm.options.hardbreaks) as document:
                 parsed_md = document.to_commonmark()
                 return md.convert(parsed_md)