Need to find and replace files without extension.

I have a bunch of text files in a directory that do not have the .txt extension... what is a god one liner to add the .txt extension to these files but if the files already have and extension of some sort omit those?
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ThaidogAsked:
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woolmilkporcConnect With a Mentor Commented:
cd /path/to/directory
find . -type f -maxdepth 1 ! -name "*\.[0-9A-Za-z]*" -print0| xargs -0 -i{} echo mv {} {}.txt

echo is for a dry run. Remove it to perform the actual operation.

The above assumes "extension of some sort" consisting of a dot "." and any number of alphanumeric characters.
Should you want to test for shorter extensions only please let me know!
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Thomas GrassiSystems AdministratorCommented:
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