Adjust md_in_html "markdown" blocks to process content consistently
#868
| Job | Run time |
|---|---|
| 9s | |
| 28s | |
| 22s | |
| 27s | |
| 19s | |
| 29s | |
| 1m 24s | |
| 25s | |
| 45s | |
| 1m 26s | |
| 1m 9s | |
| 1m 7s | |
| 26s | |
| 8m 56s |