diff --git a/shapes3d.scad b/shapes3d.scad
index f6e7f271..24ddd418 100644
--- a/shapes3d.scad
+++ b/shapes3d.scad
@@ -93,7 +93,7 @@ function cube(size=1, center, anchor, spin=0, orient=UP) =
 // Module: cuboid()
 // Synopsis: Creates a cube with chamfering and roundovers.
 // SynTags: Geom
-// Topics: Shapes (3D), Attachable, VNF Generators
+// Topics: Shapes (3D), Attachable
 // See Also: prismoid(), rounded_prism()
 // Usage: Standard Cubes
 //   cuboid(size, [anchor=], [spin=], [orient=]);
@@ -2424,7 +2424,7 @@ module zcyl(
 //   id1 = Inner diameter of bottom of tube.
 //   id2 = Inner diameter of top of tube.
 //   ifn = Set the number of facets on the inside of the tube.
-//   circum = If true, the tube hold will circumscribe the circle of the given size.  Otherwise inscribes.  Default: `false`
+//   circum = If true, the tube hole will circumscribe the circle of the given size.  Otherwise inscribes.  Default: `false`
 //   shift = [X,Y] amount to shift the center of the top end with respect to the center of the bottom end.
 //   rounding = The radius of the rounding on the ends of the tube.  Default: none.
 //   rounding1 = The radius of the rounding on the bottom end of the tube.
@@ -2474,8 +2474,8 @@ module zcyl(
 //   back_half()
 //     tube(ir=10,or=20,h=30, ochamfer1=-5,irounding1=-3, orounding2=6, ichamfer2=2);
 // Example: Tube with hexagonal hole circumscribing its diameter
-//   tube(od=22, id=9, h=10, $fn=48, ifn=4, circum=true);
-//   half_of(v=[-1,1])color("lightblue") cyl(d=9, h=12);
+//   tube(od=22, id=9, h=10, $fn=48, ifn=6, circum=true);
+//   half_of(v=[-1,1]) color("lightblue") cyl(d=9, h=12);
 // Example: Round ended hexagonal tube using `rounding_fn` to get sufficient facets on the roundings
 //   tube(or=10, ir=7, h=10, $fn=6, rounding_fn=64, rounding=1.3, teardrop=true);