I just picked one file, but there might be some other occurrences of such "things".
https://codereview.appspot.com/116040043/diff/20001/Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly File Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly (right): https://codereview.appspot.com/116040043/diff/20001/Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly#newcode88 Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly:88: \once \once \hide NoteHead c'1 | Why this doubled "\once"? https://codereview.appspot.com/116040043/diff/20001/Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly#newcode124 Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly:124: \once \once \hide NoteHead g1 | idem https://codereview.appspot.com/116040043/diff/20001/Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly#newcode160 Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly:160: \once \once \hide NoteHead e'1 | idem https://codereview.appspot.com/116040043/diff/20001/Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly#newcode192 Documentation/snippets/ancient-notation-template----modern-transcription-of-mensural-music.ly:192: \once \once \hide NoteHead e1 | idem https://codereview.appspot.com/116040043/ _______________________________________________ lilypond-devel mailing list lilypond-devel@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-devel