From the bash man page in bash-2.04-2:
Produce the list of files that are required for the
shell script to run. This implies '-n' and is sub-
ject to the same limitations as compile time error
checking checking; Backticks,  tests, and evals
are not parsed so some dependencies may be missed.
--verbose Equivalent to -v.
The "--verbose" option isn't indented properly.