Update docs to clarify in the shell-form section that heredocs apply only to supported commands

daghack · daghack · commit 152b5d81888d · 2024-08-20T15:18:40.000-07:00
Signed-off-by: Talon Bowler &lt;talon.bowler@docker.com&gt;
diff --git a/frontend/dockerfile/docs/reference.md b/frontend/dockerfile/docs/reference.md
@@ -514,7 +514,7 @@ They're equivalent to the following line:
 RUN source $HOME/.bashrc && echo $HOME
 ```
 
-You can also use heredocs with the shell form to break up a command:
+You can also use heredocs with the shell form to break up supported commands.
 
 ```dockerfile
 RUN <<EOF
