File and Dir exists? replaced with exist? #160
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See e.g. https://bugs.ruby-lang.org/issues/17391 -- the
exists?
variants were deprecated in ruby 2.1 and removed in 3.2.The
exist?
variants seem to be already present in 1.9.1 (see 1 and 2), so shouldn't affect our list of supported versions.(Note that other changes were needed to run on latest ruby for me, this is just the one that seems easiest / least controversial)