• Converts a list to a tab-delimited file
• File can be downloaded and then uploaded into Excel
• Elements at the top level of the list are treated as separate lines
• Elements at the second level are separated by tabs
• Elements at lower levels are retained as sublists

EXAMPLE:
Suppose blast-hits contains the following list:

(("gene1" 2E-47 34 339)
 ("gene2" 4E-29 98 240)
 ("gene3" 1E-20 (10 50) (80 230)))

Then:

WRITE-TAB-DELIMITED-FILE blast-hits.txt blast-hits)

produces a file containing:

"gene1" tab 2E-47 tab 34 tab 339
"gene2" tab 4E-29 tab 98 tab 240
"gene3" tab 1E-20 tab (10 50) tab (80 230)
...