Add simple script to test/show sgr 2 8 9 53

(cherry picked from commit 19804bc2df)

tests/sgr2-8-9-53.sh

@@ -0,0 +1,25 @@
+#!/bin/sh --
+#
+# faint intensity support (SGR 2)
+# conceal support (SGR 8)
+# strikeout support (SGR 9)
+# overline support (SGR 53)
+
+# echo 'D\e[2mD\e[9mD\e[53mD\e[8mD' 
+
+echo ""; echo ""
+echo "    faint concel strikeout overline"
+#for fg in 30 31 32 33 34 35 36 37 39
+for fg in 30
+do
+    for bg in 40 41 42 43 44 45 46 47 49
+    do
+        for sgr in 2 8 9 53
+        do
+            l1="${l1}[${fg};${bg};1m XX "
+            l1="${l1}[${fg};${bg};${sgr}m XX "
+        done
+        l1="${l1}\n"
+    done
+    echo "$l1"
+done