-// If include_fixed_spacing is true, the manually fixed spacings
-// induced by stretchable=0 or alignment-distances are included
-// in the minimum translations here. If you want to find the minimum
-// height of a system, include_fixed_spacing should be true. If you
-// want to actually lay out the page, then it should be false (or
-// else centered dynamics will break when there is a fixed alignment).
+// If include_fixed_spacing is false, the only constraints that will be measured
+// here are those that result from collisions (+ padding) and minimum-distance
+// between adjacent staves.
+// If include_fixed_spacing is true, constraints from line-break-system-details,
+// basic-distance+stretchable=0, and staff-staff-spacing of spaceable staves
+// with loose lines in between, are included as well.
+// - If you want to find the minimum height of a system, include_fixed_spacing should be true.
+// - If you're going to actually lay out the page, then it should be false (or
+// else centered dynamics will break when there is a fixed alignment).