Use safer way to compose $style

bin/eedmenu.in

@@ -30,15 +30,17 @@ sb="$(iniread -p style.color.sng)"
 sf="$(iniread -p style.color.sfg)"
 fn="$(iniread -p style.font)"
 fn=${fn:--*-terminus-medium-r-*-*-16-*-*-*-*-*-*-*}
-arg_nb="${nb:+-nb $nb}"
-arg_nf="${nf:+-nf $nf}"
-arg_sb="${sb:+-sb $sb}"
-arg_sf="${sf:+-sf $sf}"
-arg_fn="${fn:+-fn $fn}"
-style="$arg_nb $arg_nf $arg_sb $arg_sf $arg_fn"
+
+style() {
+    test -n "$nb" && echo -n "-nb $nb "
+    test -n "$nf" && echo -n "-nf $nf "
+    test -n "$sb" && echo -n "-sb $sb "
+    test -n "$sf" && echo -n "-sf $sf "
+    test -n "$fn" && echo -n "-fn $fn "
+}
 
 do_split() {
     cut -d$delim -f2-
 }
 
-dmenu -i -l $lines $style "$@" | $maybe_split
+dmenu -i -l $lines $(style) "$@" | $maybe_split