Research / Constructs / Quotes, dividers, and line breaks
Blockquotes, dividers, and hard line breaks in five publishing editors
One Markdown fixture, five real publishing editors, tested 2026-08-24. For quotes, dividers, and line breaks the observed result was changed in X and LinkedIn; kept in WordPress, Substack, and Beehiiv. Every row below is a rule with its own page and its own dated record.
Matches blockquote, divider, hard_break. Fixture markdown-portability-test-v1. Tested 2026-08-24. How these tests are run.
What happens, per destination
| Destination | What happens | Result | Severity | Rule | Confidence | Last tested |
|---|---|---|---|---|---|---|
| X | Dividers become a simple separator line. | Changed | Info | X-DIV-01 | Verified | 2026-08-24 |
| X | Quotes get a Quote: label. | Changed | Info | X-QUOTE-01 | Verified | 2026-08-24 |
| Quotes get a Quote: label. | Changed | Info | LI-QUOTE-01 | Verified | 2026-08-24 | |
| Substack | Hard breaks and paragraphs survive. | Kept | Info | SUB-BREAK-01 | Verified | 2026-08-24 |
| Substack | Quotes and dividers survive. | Kept | Info | SUB-QUOTE-01 | Verified | 2026-08-24 |
| Beehiiv | Hard breaks add extra vertical space. | Kept | Review | BEE-BREAK-01 | Verified | 2026-08-24 |
| Beehiiv | Quotes and dividers become native blocks. | Kept | Info | BEE-QUOTE-01 | Verified | 2026-08-24 |
| X | Paragraph spacing and hard breaks are preserved. | Kept | Info | X-PARA-01 | Verified | 2026-08-24 |
| Paragraph spacing and hard breaks are preserved. | Kept | Info | LI-PARA-01 | Verified | 2026-08-24 |
Limits of what was tested
- Each result describes the surface named beside it, on the date named beside it, and nothing wider.
- A result marked unknown means no dated test covers it. It is not a prediction.
- Rendering is not the same across platform versions, themes, plugins, or email clients.
Prepare a draft
- Check your own draft against all five destinations
- Markdown to WordPress, handoff mode: gutenberg paste
- Markdown to Substack, handoff mode: rich html clipboard
- Markdown to Beehiiv, handoff mode: clean markdown paste
- Markdown to X, handoff mode: plain text
- Markdown to LinkedIn, handoff mode: plain text
Related
- The 9 rules behind this page:
BEE-BREAK-01,BEE-QUOTE-01,LI-PARA-01,LI-QUOTE-01,SUB-BREAK-01,SUB-QUOTE-01,X-DIV-01,X-PARA-01,X-QUOTE-01 - Every construct, side by side
- The full five-destination matrix