Without further ado, the following was found: Issue: I<usage()> → I<usage>() "The program below is designed to allow experimenting with user namespaces, " "as well as other types of namespaces. It creates namespaces as specified by " "command-line options and then executes a command inside those namespaces. " "The comments and I<usage()> function inside the program provide a full " "explanation of the program. The following shell session demonstrates its " "use."