My input is a csv file like this:

```
10,"Special Projects,bangaram",0,,0
10,"Statutory/ Internal Audit , MO reporting (incl Excel Spreadsheet uploadation)
",     bangaram,0,,0
10,"Complience with SVCCL",     bangaram,       0,,     0
10,     "Release of incentives / commission to all channel partners.
",      bangaram,       0,,     0
10,"Timely processing of sales orders to channel partners",     bangaram,       0,,     0
10,"    Balance sheet Reviwe", bangaram,        0,,     0
10,"    Ensuring Critical Reconciliation on monthly basis. (IN-GL)",    bangaram,       0,,     0
10,     "Timely & accurate closure of Accounts.
",      bangaram,       0,,     0
11,"    Opex Spend on communication activites", bangaram,       0,,     0
11,"    Opex Spend on communication activites", bangaram        ,0,,    0

```

I need to get output like this:

```
10,"Special Projects,bangaram",0,,0
10,"Statutory/ Internal Audit , MO reporting (incl Excel Spreadsheet uploadation)",     bangaram,0,,0
10,"Complience with SVCCL",     bangaram,       0,,     0
10,     "Release of incentives / commission to all channel partners.",      bangaram,       0,,     0
10,"Timely processing of sales orders to channel partners",     bangaram,       0,,     0
10,"    Balance sheet Reviwe", bangaram,        0,,     0
10,"    Ensuring Critical Reconciliation on monthly basis. (IN-GL)",    bangaram,       0,,     0
10,     "Timely & accurate closure of Accounts.",      bangaram,       0,,     0
11,"    Opex Spend on communication activites", bangaram,       0,,     0
11,"    Opex Spend on communication activites", bangaram        ,0,,    0

```

Where ever new line is der that will be delete and then add to previous line.
Please write shell script regarding this.