pr:tldr:2d7ce

The command "pr -h "${header}" ${file1} ${file2} ${file3}" uses the "pr" command-line utility to combine and display the contents of three files (${file1}, ${file2}, ${file3}) in a more readable format.

Here is a breakdown of the command:

• "pr" is a Unix command that paginates or concatenates files for printing or screen display.
• "-h "${header}"" specifies the header text that will be displayed at the top of each page.
• ${file1}, ${file2}, and ${file3} represent the paths or names of the three files that need to be combined and displayed.
• The command is executing in a Unix-like operating system, where variables like ${header}, ${file1}, ${file2}, and ${file3} are being replaced with their actual values before the command is run.

Overall, this command will take the contents of the specified files and format them for better readability, with a custom header displayed at the top of each page.