How to fill a line with character x up to column y using Vim

Question

How can I fill the remainder of a line with the specified character up to a certain column using Vim? For example, imagine that the cursor is on column four and I want to fi

Answer 1

I actually stumbled across this looking to align columns. Just in case anyone else does the same, this thread might be useful: How to insert spaces up to column X to line up things in columns?