why-{skip,error}.md: Cleanup (#9602)

util/why-error.md

@@ -1,5 +1,5 @@
 This file documents why some tests are failing:
-
+* gnu/tests/cp/cp-a-selinux.sh
 * gnu/tests/cp/preserve-gid.sh
 * gnu/tests/date/date-debug.sh
 * gnu/tests/date/date.pl

util/why-skip.md

@@ -12,32 +12,14 @@
 = LD_PRELOAD was ineffective? =
 * tests/cp/nfs-removal-race.sh
 
-= temporarily disabled =
-* tests/mkdir/writable-under-readonly.sh
-
 = this system lacks SMACK support =
 * tests/mkdir/smack-root.sh
 * tests/mkdir/smack-no-root.sh
 * tests/id/smack.sh
 
-= this system lacks SELinux support =
-* tests/mkdir/selinux.sh
-* tests/mkdir/restorecon.sh
-* tests/misc/selinux.sh
-* tests/misc/chcon.sh
-* tests/install/install-Z-selinux.sh
-* tests/install/install-C-selinux.sh
-* tests/id/no-context.sh
-* tests/id/context.sh
-* tests/cp/no-ctx.sh
-* tests/cp/cp-a-selinux.sh
-
 = timeout returned 142. SIGALRM not handled? =
 * tests/misc/timeout-group.sh
 
-= FULL_PARTITION_TMPDIR not defined =
-* tests/misc/tac-continue.sh
-
 = can't get window size =
 * tests/misc/stty-row-col.sh
 
@@ -50,10 +32,12 @@
 = no rootfs in mtab =
 * tests/df/skip-rootfs.sh
 
-= insufficient mount/ext2 support =
-* tests/cp/cp-mv-enotsup-xattr.sh
-
 = requires controlling input terminal =
 * tests/misc/stty-pairs.sh
 * tests/misc/stty.sh
 * tests/misc/stty-invalid.sh
+
+= Disabled. Enabled at GNU coreutils > 9.9 =
+* tests/misc/tac-continue.sh
+* tests/mkdir/writable-under-readonly.sh
+* tests/cp/cp-mv-enotsup-xattr.sh