What's the (quick and) easy way to set the indentation of a \begin{code}/\end{code} or \begin{spec}/\end{spec}? That is, I want to set only the indentation of the whole block, not the indentation of the columns in the code (which can be configured by \hsindent as described in the documentation).
One solution would be to use \texths (as mentioned here) and a minipage, but I suspect there are better/nicer options.