chore: disable list behaviour if line starts with plus

src/components/markdown/RemarkRenderer.tsx

@@ -199,6 +199,11 @@ const RE_HTML_TAGS = /^(<\/?[a-zA-Z0-9]+>)(.*$)/gm;
  */
 const RE_EMPTY_LINE = /^\s*?$/gm;
 
+/**
+ * Regex for matching line starting with plus
+ */
+const RE_PLUS = /^\s*\+(?:$|[^+])/gm;
+
 /**
  * Sanitise Markdown input before rendering
  * @param content Input string
@@ -215,6 +220,11 @@ function sanitise(content: string) {
             // https://github.com/revoltchat/revite/issues/733
             .replace(RE_HTML_TAGS, (match) => `\u200E${match}`)
 
+            // Append empty character if line starts with a plus
+            // which would usually open a new list but we want
+            // to avoid that behaviour in our case.
+            .replace(RE_PLUS, (match) => `\u200E${match}`)
+
             // Replace empty lines with non-breaking space
             // because remark renderer is collapsing empty
             // or otherwise whitespace-only lines of text