Mislav Marohnić 43b28caa94 Fix discovering .ruby-version files in root directory
It's not that this is a preferred way to set a global version (one
should use `rbenv global <version>` instead), but this fixes the
function purely for correctness: all parent directories should be
scanned, even the root directory.

Fixes #745
2015-06-09 17:24:15 +02:00
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