[m-users.] file_exists? directory_exists?

[emacstheviking]

Hi,

All I have found is see/seen to see if a file exists. Have I missed
something totally obvious ?
And how about checking the existence of a directory too?

It feels bad to have to use "see" and then "seen" (to undo see) just to
test a file exists.

I am sure I have not found the docs but TBH they doc are just the code for
the module and when you are learning this stuff it makes it pretty hard to
find anything at times.

Thanks,
Sean.
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