Minor formating fix in coreutils-replacement

Fix minor issue that prevent page to be rendered properly.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

content/concepts/coreutils-replacement.md

@@ -69,6 +69,7 @@ Maturity: Medium
 - Missing commands and features
 - Not used in production environments
 - Depends on many Rust crates, which may not all be already available in Debian
+
 **Notes**
 - Semi-done: `cp expr install ls more od printf sort split tail test date join df`
 - To do: `chcon csplit dd numfmt pr stty`