Update ros2 param dump dosctring (`-h` option).

[mmmarinho]

As mentioned in #836 , this pull request aims to correct the ros2 param dump -h information.

Current doc

https://github.com/ros2/ros2cli/blob/960962a142323c7a13c4ddef3a7e661d77905f93/ros2param/ros2param/verb/dump.py#L31-L32

Proposed change

class DumpVerb(VerbExtension):
    """Show all of the parameters of a node in a YAML file format."""

Based on

The current docstring for ros2 param describe

https://github.com/ros2/ros2cli/blob/960962a142323c7a13c4ddef3a7e661d77905f93/ros2param/ros2param/verb/describe.py#L27-L28

mixed with the documentation at https://docs.ros.org/en/rolling/How-To-Guides/Using-ros2-param.html#ros2-param-dump

This command will print out all of the parameters on a particular node in a YAML file format.

I'd be glad to update this PR as needed.

[fujitatomoya]

@mmmarinho can you address DCO error? https://github.com/ros2/ros2cli/pull/837/checks?check_run_id=14811514019

[mmmarinho]

@mmmarinho can you address DCO error? https://github.com/ros2/ros2cli/pull/837/checks?check_run_id=14811514019

Sure thing, thanks for the info on how to do it.

[fujitatomoya]

CI:

• Linux
• Linux-aarch64
• Windows

[fujitatomoya]

@Mergifyio backport humble

[mergify[bot]]

backport humble

✅ Backports have been created

* [#840 Update ros2 param dump dosctring (`-h` option). (backport #837)](https://github.com/ros2/ros2cli/pull/840) has been created for branch `humble`

[fujitatomoya]

@Mergifyio backport iron

[mergify[bot]]

backport iron

✅ Backports have been created

* [#841 Update ros2 param dump dosctring (`-h` option). (backport #837)](https://github.com/ros2/ros2cli/pull/841) has been created for branch `iron`