diff --git a/gnu/build/image.scm b/gnu/build/image.scm
index 49dc01c0d1..6ca0a428e0 100644
--- a/gnu/build/image.scm
+++ b/gnu/build/image.scm
@@ -328,18 +328,16 @@ GRUB configuration and OS-DRV as the stuff in it."
          "-volume_date" "all_file_dates" "=1"
 
          `(,@(if compression?
-                 '(;; ‘zisofs’ compression reduces the total image size by
-                   ;; ~60%.
+                 '(;; ‘zisofs’ compression reduces the total image size by ~60%.
                    "-zisofs" "level=9:block_size=128k" ; highest compression
                    ;; It's transparent to our Linux-Libre kernel but not to
-                   ;; GRUB.  Don't compress the kernel, initrd, and other
-                   ;; files read by grub.cfg, as well as common
-                   ;; already-compressed file names.
+                   ;; GRUB.  Don't compress the kernel, initrd, and other files
+                   ;; read by grub.cfg, as well as common already-compressed
+                   ;; file names.
                    "-find" "/" "-type" "f"
                    ;; XXX Even after "--" above, and despite documentation
-                   ;; claiming otherwise, "-or" is stolen by grub-mkrescue
-                   ;; which then chokes on it (as ‘-o …’) and dies.  Don't use
-                   ;; "-or".
+                   ;; claiming otherwise, "-or" is stolen by grub-mkrescue which
+                   ;; then chokes on it (as ‘-o …’) and dies.  Don't use "-or".
                    "-not" "-wholename" "/boot/*"
                    "-not" "-wholename" "/System/*"
                    "-not" "-name" "unicode.pf2"