Fix newline on edit messages with quotes

src/Markdown.ts

@@ -56,12 +56,6 @@ function isAllowedHtmlTag(node: commonmark.Node): boolean {
 function isMultiLine(node: commonmark.Node): boolean {
  let par = node;
  while (par.parent) {
- // commonmark Parser separate quotes with blank quoted lines between them with
- // paragraphs, so we need to consider it when the markdown is only a multiline quote.
- if (par.type === 'block_quote') {
- break;
- }
-
  par = par.parent;
  }
  return par.firstChild != par.lastChild;
@@ -135,7 +129,10 @@ export default class Markdown {
  // 'inline', rather than unnecessarily wrapped in its own
  // p tag. If, however, we have multiple nodes, each gets
  // its own p tag to keep them as separate paragraphs.
- if (isMultiLine(node)) {
+ // However, if it's a blockquote, adds a p tag anyway
+ // in order to avoid deviation to commonmark and unexpected
+ // results when parsing the formatted HTML.
+ if (node.parent.type === 'block_quote'|| isMultiLine(node)) {
  realParagraph.call(this, node, entering);
  }
  };