Proposition of support for verse without lyrics

patacrep/songs/chordpro/data/latex/content_verse

@@ -1,8 +1,11 @@
 (*- if content.nolyrics -*)
-    TODO NOLYRICS
-    (* for line in content.lines *)
-        (( render(line) ))
-    (* endfor *)
+\begin{verse*}
+\musicnote{\nolyrics
+  (* for line in content.lines *)
+    (( render(line) ))
+  (* endfor *)
+}
+\end{verse*}
 (*- else *)
 \begin{(( content.type ))}
   (* for line in content.lines *)

test/test_chordpro/nolyrics.tex

@@ -12,15 +12,19 @@
 \end{verse}
 
 
-TODO NOLYRICS
-        \[A B#]
-
-
-
-TODO NOLYRICS
-        \[A] \[B]
-        \[C]
-
+\begin{verse*}
+\musicnote{\nolyrics
+    \[A B#]
+}
+\end{verse*}
+
+
+\begin{verse*}
+\musicnote{\nolyrics
+    \[A] \[B]
+    \[C]
+}
+\end{verse*}
 
 
 \begin{verse}