add copyright to help

cawk

@@ -33,6 +33,13 @@ error[0]="Exiting..."
 error[1]="Invalid expression!"
 error[2]="Invalid argument!"
 
+copy='Copyright (C) 2022 Blau Araujo <blau@debxp.org>.
+
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+'
+
 help="cawk ($version) - REPL calculator in Bash and AWK
 
 USAGE
@@ -74,10 +81,10 @@ repl() {
         read -erp ': '
         history -s "$REPLY"
         case "${REPLY,,}" in
-            f*( )+([0-9])) PRECISION=${REPLY:1}    ;;
-             h|'?') echo "$help"            ;;
-            q|quit) die 0                   ;;
-                 *) calc "$REPLY" $PRECISION;;
+            f*( )+([0-9])) PRECISION=${REPLY:1};;
+             h|'?') echo "$help"               ;;
+            q|quit) die 0                      ;;
+                 *) calc "$REPLY" $PRECISION   ;;
         esac
     done
 }
@@ -86,7 +93,7 @@ opts() {
     local param
     for param; do
         case $param in
-            -h|--help) echo "$help"; exit   ;;
+            -h|--help) echo "$help"; echo "$copy"; exit;;
                    -e) EXPRESSION=${@:2:1}  ;;
                  -e?*) EXPRESSION=${param:2};;
                    -f) PRECISION=${@:2:1}   ;;