Improved 'move' command.

- Removed (accidental) printing of the task (without leading ITEM#) when checking for existence of the task; using empty check of task text as done elsewhere.
- Simplified error handling and using die() for proper exit code.
- Aligned verbose move message with the verbose output of other commands.

todo.sh

@@ -957,10 +957,11 @@ case $action in
 
     [[ "$item" = +([0-9]) ]] || die "$errmsg"
 
-    if [ -f "$src" ]; then
-        if [ -f "$dest" ]; then
-            if sed -ne "$item p" "$src" | grep "^."; then
+    [ -f "$src" ] || die "TODO: Source file $src does not exist."
+    [ -f "$dest" ] || die "TODO: Destination file $dest does not exist."
+
     MOVEME=$(sed "$item!d" "$src")
+    [ -z "$MOVEME" ] && die "$item: No such item in $src."
     if  [ $TODOTXT_FORCE = 0 ]; then
         echo "Move '$MOVEME' from $src to $dest? (y/n)"
         read ANSWER
@@ -977,19 +978,13 @@ case $action in
         fi
         echo "$MOVEME" >> "$dest"
 
-                    [ $TODOTXT_VERBOSE -gt 0 ] && echo "TODO: '$MOVEME' moved from '$src' to '$dest'."
+        if [ $TODOTXT_VERBOSE -gt 0 ]; then
+            echo "$item: $MOVEME"
+            echo "TODO: $item moved from '$src' to '$dest'."
+        fi
     else
         echo "TODO: No tasks moved."
     fi
-            else
-                echo "$item: No such item in $src."
-            fi
-        else
-            echo "TODO: Destination file $dest does not exist."
-        fi
-    else
-        echo "TODO: Source file $src does not exist."
-    fi
     ;;
 
 "prepend" | "prep" )