fix breaks

Author: UziTech

lib/marked.js

@@ -634,7 +634,10 @@ inline.gfm.url = edit(inline.gfm.url, 'i')
 
 inline.breaks = merge({}, inline.gfm, {
   br: edit(inline.br).replace('{2,}', '*').getRegex(),
-  text: edit(inline.gfm.text).replace(/\{2,\}/g, '*').getRegex()
+  text: edit(inline.gfm.text)
+    .replace('\\b_', '\\b_| {2,}\\n')
+    .replace(/\{2,\}/g, '*')
+    .getRegex()
 });
 
 /**