Each field simply contains information which cannot fit to one row...
You have several options how to solve it:
1) LIST STRUCTURE TO FILE <filename> and process the file in some text editor
2) Use printer having sufficient number of characters per line
3) Export the structure to a database table (COPY STRUCTURE TO StruTbl EXTENDED) and print the structure from this table by your own report - this may take about 10 minutes of work first time but the report is reusable...
So, do you still need some external utility?