refactor: add regularity to spaces

1) switch all the miscellaneous indentation to 4 spaces

2) remove the space before the parenthesis of function

3) add indentation inside of if

4) remove miscellaneous spaces at the end of lines

zfs-inplace-rebalancing.sh

@@ -36,7 +36,6 @@ function color_echo () {
     echo -e "${color}${text}${Color_Off}"
 }
 
-
 function get_rebalance_count() {
     file_path=$1
 
@@ -244,7 +243,7 @@ while true ; do
         break
         ;;
     esac
-done;
+done
 
 root_path=$1