t5.geo; typos? and questions

Dear dmsh experts...

I'm new in this field and have just started learning gmsh using its tutorials.

I think there're a few typographic errors in the comments of t5.geo: a possible correction would be;

--- t5.geo~	2023-03-21 17:13:23.000000000 +0900
+++ t5.geo	2024-05-05 13:12:19.306383730 +0900
@@ -91,10 +91,10 @@
 
   // We need non-plane surfaces to define the spherical holes. Here we use
   // `Surface', which can be used for surfaces with 3 or 4 curves on their
-  // boundary. With the he built-in kernel, if the curves are circle arcs, ruled
+  // boundary. With the built-in kernel, if the curves are circle arcs, ruled
   // surfaces are created; otherwise transfinite interpolation is used.
   //
-  // With the OpenCASCADE kernel, `Surface' uses a much more general generic
+  // With the OpenCASCADE kernel, `Surface' uses a much more general
   // surface filling algorithm, creating a BSpline surface passing through an
   // arbitrary number of boundary curves; and `ThruSections' allows to create
   // ruled surfaces (see `t19.geo').

One more question: in one of the comments in t5.geo, it reads "With the built-in kernel, if the curves are circle arcs, ruled surfaces are created;". According to the description of ruled surface in wikipedia, "a surface S is ruled (also called a scroll) if through every point of S there is a straight line that lies on S." But each surface in one CheeseHole is 1/8 of a spherical surface and I don't think any straight line can be laid on it.

Do I misunderstand?

Thanks in advance.

Kazuyoshi