diff --git a/docs/src/userguide/formatter.md b/docs/src/userguide/formatter.md
index a1b6462..531f36f 100644
--- a/docs/src/userguide/formatter.md
+++ b/docs/src/userguide/formatter.md
@@ -21,7 +21,7 @@ f(x) = 2x + 3
 print(f'(2))
 
 open("myfile.txt", "w") do io
-	write(io, "Hello world!")
+    write(io, "Hello world!")
 end;
 ```