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For example: gemfile, config, and all other file names with no extensions.

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Is this a windows question, i.e. "Can windows assosiate extensionless files with a program?" or a Dreamweaver question "It won't open files of unknown extension"? –  soandos May 31 '11 at 18:47
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up vote 1 down vote accepted

If its the first look here. For windows 7 see here

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