Chord Symbols

[Lyle Raymond]

Using Lilypond 2.3.12, I have noticed that "X:maj7" is no longer rendered with 
the delta (triangle), but now is notated as "XM."  How can I revert to the 
old style?




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  Version: 1.0
  GMU/O d+@ s: a C++ UL P+>++++ L++ E-(---) W++ N++ o--@ K- w+(--) !O !M V 
PS--(+) PE++ Y !PGP t+() !5 X+() R+++($) tv b++>+++ DI@ !D G e++>++++ h---@ 
r++ y?
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