There's a cleaner way to do this, commit to module formatter pending.

Revert "No longer need to reference 'version_added' in docs for these, as this was quite a while ago."

This reverts commit ff0a41d446.

library/commands/shell

@@ -10,7 +10,7 @@ description:
      - The shell module takes the command name followed by a list of arguments,
        space delimited. It is almost exactly like the M(command) module but runs
        the command through a shell (C(/bin/sh)) on the remote node.
-version_added: historical
+version_added: "0.2"
 options:
   (free form):
     description: