Files with no extension can be in in most cases encounter as special files for No Code Style.
NO file extension - No code file
What is no file? How to open no files?
File type specification:
File extension no is the preferred extension for files for No Code files. According to the source, No code is not stored in files, but if there is really reason to use files, they should use no file extension.
More about No Code can be found on the GitHub source.