nu:tldr:54786

The given command nu --commands "${echo 'nu is executed'}" has two main components:

1. nu: It is the name or path of an executable program or script.

2. --commands "${echo 'nu is executed'}": This part of the command passes a string argument to the program or script being executed (nu in this case).

   Within this argument, there is a subcommand enclosed in single quotes ('nu is executed'): echo 'nu is executed'. The echo command is used to print the specified message to the standard output. In this case, it will display nu is executed. The output of echo is then enclosed within double quotes ("${...}"), which allows it to be expanded and treated as a single argument.

   So, when the command nu --commands "${echo 'nu is executed'}" is executed, it will run the nu program or script and provide the output nu is executed as the value of the --commands argument. The behavior of the nu program or script with this command depends on its specific implementation and purpose.