Determine why installing JRuby prints a "No md5 checksum" warning

[postmodern]

Description

Determine why there's a "No md5 checksumwarning when installing JRuby 10.0.0.1. Upon inspection, the md5 checksum forjruby-dist-10.0.0.1-bin.tar.gz is definitely in the [jruby/checksums.md5` file](https://github.com/postmodern/ruby-versions/blob/441f789da943f60a0b58913d7255e6252b0c6607/jruby/checksums.md5#L759).

Steps To Reproduce

Steps to reproduce the bug:

1. $ ruby-install -U jruby

Expected Behavior

No warning.

Actual Behavior

>>> Verifying jruby-dist-10.0.0.1-bin.tar.gz ...
*** No md5 checksum for /usr/local/src/jruby-dist-10.0.0.1-bin.tar.gz

Environment

$ ruby-install --version
ruby-install: 0.10.1