`is_executable_file` API is inconsistent

[Mike Williamson]

The call

is_executable_file(<whatever list of strings you choose>)

acts more as if it were

assert_all_are_executable_files(<whatever>)

and in fact the two functions give nearly identical results.

Expectation:

I would expect that is_executable_file(<whatever>) would work like is_readable_file, where a named boolean vector is returned.

assertive.files:

Version: 0.0-2

Regards, Mike Williamson