I just stumbled on a bit of notation in a music score, and I'm stumped as to what it means. It's a single square bracket, spanning the whole staff, to the left of a single note.
This is measure 58 of Fandango, by Padre Antonio Soler, arr. Fernand Vera, for guitar duo. The piece is in D minor.
There are also similar brackets in measures 63, 64 and 65,
as well as 98 and 125.
What does the bracket mean?