Wrong command option in the manual examples

[hk]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -g -O2 -Wno-parentheses -Wno-format-security
uname output: Linux hk 4.15.0-62-generic #69-Ubuntu SMP Wed Sep 4 20:55:53
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.0
Patch Level: 0
Release Status: release

Description:
        On the section 3.2.6(GNU Parallel, page 16 in the pdf) of Bash
Reference Manual. The manual uses `find' command to illustrate
possible use cases of `parallel' as examples. but the option `-depth'
does not accept any argument, I think it means `-maxdepth` option
instead.

Repeat-By:
        [Describe the sequence of events that causes the problem
        to occur.]

Fix:
        replace `-depth' with `-maxdepth'