pkg/shell: Fix test when running as root.

pkg/shell/paths_test.elvts

@@ -46,6 +46,10 @@
 ▶ $true
 
 ## errors if unable to create run directory ##
+// We rely on the permission bits of the parent directory to prevent creation of
+// the run direction, but this doesn't work for root (who ignores the permission
+// bits entirely).
+//skip-if-root
 ~> use os
    os:mkdir-all &perm=0o000 xdg_runtime_dir
    set E:XDG_RUNTIME_DIR = $pwd/xdg_runtime_dir

pkg/shell/transcripts_test.go

@@ -46,6 +46,11 @@ func TestTranscripts(t *testing.T) {
 			testutil.Umask(t, must.OK1(strconv.Atoi(arg)))
 		},
 		"in-temp-home", func(t *testing.T) { testutil.InTempHome(t) },
+		"skip-if-root", func(t *testing.T) {
+			if os.Getuid() == 0 {
+				t.SkipNow()
+			}
+		},
 	)
 }