diff --git a/README.md b/README.md
index 94e15d1..7d237eb 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,12 @@ All of the above callout types has the following [four general attributes](https
 - `appearance`: `default`, `minimal` or `simple`
 - `icon`: `true` or `false`
 
+And we can specify them as, for example,
+
+```
+::: {.gist user=tarleb gist_id=852f6ae98764bea56aeeac979f3c17be collapse=false appearance=simple icon=false caption="Lua Demo"}
+:::
+```
 
 ## Example
 
diff --git a/example.qmd b/example.qmd
index 17a0c99..346b585 100644
--- a/example.qmd
+++ b/example.qmd
@@ -21,7 +21,7 @@ filters:
 
 ### Mastodon
 
-::: {.mastodon url="https://fosstodon.org/@pandoc/109712438144865859"}
+::: {.mastodon url="https://fosstodon.org/@pandoc/109712438144865859" }
 :::