deletions | additions       diff --git a/test.m.tex b/test.m.tex  index 42ceef2..36bddf3 100644  --- a/test.m.tex  +++ b/test.m.tex 
...
L = 87;  dtmfrun(xx, L, fs) % Outputs '407*89132#BADC'  spectogram(xx, spectrogram(xx,  fs) \end{lstlisting}