13.6 METAFONT formatting rules

There are special formatting rules for METAFONT files.

Please do not use tabs for the indentation of commands.

When a path contains more than two points, put each point on a separate line, with the operator at the beginning of the line. The operators are indented to the same depth as the initial point on the path using spaces. The indentation mechanism is illustrated below.

def draw_something (expr test) =
  set_char_box (staff_space#, 1.6 linethickness# / 2,
                0.5 staff_space#, 0.5 staff_space#);
  if test:
    fill z1
         -- z2
         -- z3
         .. cycle;

LilyPond — Contributor’s Guide v2.21.4 (development-branch).