Change \note markup command to get a duration

Documentation/snippets/creating-metronome-marks-in-markup-mode.ly

 %% DO NOT EDIT this file manually; it is automatically
 %% generated from LSR http://lsr.di.unimi.it
 %% Make any changes in LSR itself, or in Documentation/snippets/new/ ,
 %% and then run scripts/auxiliar/makelsr.py
 %%
 %% This file is in the public domain.
-\version "2.18.0"
+\version "2.19.65"
 
 \header {
   lsrtags = "rhythms"
 
   texidoc = "
 New metronome marks can be created in markup mode, but they will not
 change the tempo in MIDI output.
 
 "
   doctitle = "Creating metronome marks in markup mode"
 } % begin verbatim
 
 \relative c' {
   \tempo \markup {
     \concat {
       (
-      \smaller \general-align #Y #DOWN \note #"16." #1
+      \smaller \general-align #Y #DOWN \note {16.} #1
       " = "
-      \smaller \general-align #Y #DOWN \note #"8" #1
+      \smaller \general-align #Y #DOWN \note {8} #1
       )
     }
   }
   c1
   c4 c' c,2
 }