Summary
The wording of files_starting_with_a_number is a bit ambiguous; the current wording is:
# There are a mix of files in this directory
# that start with letters and numbers. Print
# the filenames (just the filenames) of all
# files that start with a number recursively
# in the current directory.
After reading this, the user may not understand whether e.g. example/dir/001filename.pcx or 01dir/02subdir/thefile.txt are expected to be included.