else
                echo >&2 "# install $h $T/$h"
                rm -f "$T/$h"
-               mkdir -p `dirname "$T/$h"`
+               mkdir -p $(dirname "$T/$h")
                cp "$h" "$T/$h"
        fi
 done
-strip_leading=`echo "$T/" | sed -e 's|.|.|g'`
+strip_leading=$(echo "$T/" | sed -e 's|.|.|g')
 for th in \
        "$T"/*.html "$T"/*.txt \
        "$T"/howto/*.txt "$T"/howto/*.html \
        "$T"/technical/*.txt "$T"/technical/*.html
 do
-       h=`expr "$th" : "$strip_leading"'\(.*\)'`
+       h=$(expr "$th" : "$strip_leading"'\(.*\)')
        case "$h" in
        RelNotes-*.txt | index.html) continue ;;
        esac