How to label text files as such in zip archive
UPDATE: well, perhaps I should have tried first, but in a test I just made, if I actually run the zip command in Terminal, then the produced archive does correctly label text files as such, as reported by zipinfo. If however I select the files in a Finder window and select the command in the Finder File menu to create an archive, then the said text files are labelled as binary file, as reported by zipinfo. It thus appears my only sin was to have used the GUI rather than the command line.