diff --git a/doc.zih.tu-dresden.de/docs/contrib/content_rules.md b/doc.zih.tu-dresden.de/docs/contrib/content_rules.md
index 1a325b90c7664e8dd6c15928d3d71769fdbbdcfe..e8049f037cf1aaa68fb4d7c53681f81d5f445d40 100644
--- a/doc.zih.tu-dresden.de/docs/contrib/content_rules.md
+++ b/doc.zih.tu-dresden.de/docs/contrib/content_rules.md
@@ -330,7 +330,7 @@ placeholders. In particular, use the generic placeholders depicted in the follow
 The table also holds a second placeholder, if, e.g., you need a second login to formulate an example.
 
 | Description | Placeholder | 2nd Placeholder |
-|---|---|
+|---|---|---|
 | Username | Marie | Martin |
 | Login | `marie` | `martin` |
 | E-mail | marie@tu-dresden.de | martin@tu-dresden.de |