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ruby - Specifying Rails Version

I decided to upgrade to Ruby 2.0.0 and Rails 4.0.0. I'm trying to set these as my default programs, by using this line:

rvm use [email protected] --default

I get the error

Failed to load /Users/michaeldunnegan/.gemrc because it doesn't contain valid YAML hash

My .gemrc file is blank. I don't know what to do. I can't find any references at all.

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most likely it is not empty, there is a lot of UTF-8 characters that editor will not show you, just remove the file before continuing:

rm -f /Users/michaeldunnegan/.gemrc

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