I am completing a requirement for a bank upload of account transactions.
There is a requirement that the upload contain blanks to the right to fill a
required field. I am struggling to figure out how to do this.

Example:
If the field is 18 characters long and the entry is 10 characters long, then
they want the remaining characters expressed as blanks to the right.

So,

HowdyDoody would be "HowdyDoody "


Any ideas?