Clean up xt.dash syntax

dotfiles/config/i3/macros/xt.dash

     local nlcount;
     local lastchr;
     local single=keep;
-    case $arg in 
+    case $arg in
         -c | --chop-single)
             single=chop
         ;;
     cat > "$cache";
     nlcount=$(<"$cache" wc -l);
     lastchr=$(<"$cache" tail -c1 | hexdump -e '"%02x"');
-    case $nlcount:$lastchr:$single in 
+    case $nlcount:$lastchr:$single in
         0:??:*)
             cat "$cache"
         ;;
     rm "$cache"
 }
 
-main () { 
+main () {
     local body;
     body="$(xclip -o)"
 #   declare -p body >~/body.declare