As seen here: https://en.wikisource.org/w/index.php?title=User_talk:Matma_Rex&diff=12108727&oldid=12108300 the reply tool sometimes adds unnecessary empty lines in multi-paragraph replies.
Steps to reproduce:
- Type the following reply in source mode:
a <blockquote>x</blockquote> b
- Switch to visual
- Click "Reply"
Result: https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Talk:T300439&diff=535937&oldid=535936&diffmode=source
Expected: https://en.wikipedia.beta.wmflabs.org/w/index.php?title=Talk:T300439&diff=535938&oldid=535937&diffmode=source