Update ex_002.md

Amended example code

docs/ex_002.md

@@ -73,7 +73,7 @@ The rules and constraints for formatting an Imageset will vary depending on scre
 In 1BPP Layer modes, foreground and background colors for each onscreen tile can be specified during the Tilemap stage. We'll be looking at Tilemaps in the next example, but for now we'll just format this Imageset to 1BPP and not worry too hard about the Palette:
 
 ```.sh
-aloevera -p project.av format text_set_1 palette_1 1
+aloevera -p project.av imageset format text_set_1 palette_1 1
 ```
 
 The first 2 arguments are the ids of the Imageset and Palette specified in earlier commands, while the `1` specifies a target pixel depth of 1BPP (use `aloevera imageset format --help` to see all possible values).