==== Requirement ====
Indent the code blocks in a way similar to https://www.gnu.org/software/bash/manual/html_node/Redirections.html?

==== Solution ====
Add
<code>
pre {
    margin-left: 2em;
}
</code>
to /etc/dokuwiki/userstyle.css

==== Verify ===
For example
  Note that the order of redirections is significant. For example, the command
  <code>
  ls > dirlist 2>&1
  </code>
  directs both standard output (file descriptor 1) and standard error (file descriptor 2)
  to the file dirlist, while the command
  <code>
  ls 2>&1 > dirlist
  </code>
  directs only the standard output to file dirlist, because the standard error was made a
  copy of the standard output before the standard output was redirected to dirlist.

will render as

Note that the order of redirections is significant. For example, the command
<code>
ls > dirlist 2>&1
</code>
directs both standard output (file descriptor 1) and standard error (file descriptor 2)
to the file dirlist, while the command
<code>
ls 2>&1 > dirlist
</code>
directs only the standard output to file dirlist, because the standard error was made a
copy of the standard output before the standard output was redirected to dirlist.