Added regtest for parenthesized metronome marks

diff --git a/input/regression/metronome-parenthesized.ly b/input/regression/metronome-parenthesized.ly
new file mode 100644 (file)
index 0000000..8368e84
--- /dev/null
+++ b/input/regression/metronome-parenthesized.ly
@@ -0,0 +1,14 @@
+\version "2.11.50"
+
+\header{
+  texidoc="
+Using an empty text in the metronome marks, one can generate parenthesized tempo marks.
+"
+}
+
+\relative c'' {
+  \tempo 4=60
+  c1
+  \tempo "" 4=80
+  c1
+}