poetry.dtx: Fix the custom label setter.

Previously, it would set the first item's label as `\tanza', which,
just, no.

diff --git a/poetry.dtx b/poetry.dtx
index 223fc18..9512acd 100644 (file)
--- a/poetry.dtx
+++ b/poetry.dtx
@@ -163,7 +163,7 @@
 % are described below (if you're not interested in this sort of thing, skip
 % to the next section).
 %
-% \begin{description} \setdescriptionlabel{\cmd{#1}}
+% \begin{description} \setdescriptionlabel{\ttfamily\string#1}
 % \item [stanza] is a \LaTeX\ counter which contains the current stanza
 %       number.
 % \item [\thestanza] typesets the value of the |stanza| counter in normal