Minor inconvenience in tutorials

[cadmus-to]

Just want to flag that the action tutorial pages

• http://docs.ros.org/en/galactic/Tutorials/Actions/Writing-a-Py-Action-Server-Client.html
• http://docs.ros.org/en/galactic/Tutorials/Actions/Writing-a-Cpp-Action-Server-Client.html
  has code blocks including line numbers. When we use the copy feature, those are copied too.

[christophebedard]

A simple solution would be to just disable the line numbers. They're probably not needed.

[christophebedard]

Weirdly enough, when I build the docs locally, it's a bit different. I can't highlight the line numbers and copying using the button doesn't include the line numbers. So maybe this can be fixed.

[cadmus-to]

Might be better to disable the line numbers to be consistent with other tutorials

[audrow]

@cadmus-to, thanks for pointing this out. I agree it would be better to make this consistent by disabling line numbers. I'm going to mark this as help wanted. If you want to make a PR, feel free to @ me as a reviewer.

[clalancette]

This is actually a bug in the Read-the-Docs theme; see readthedocs/sphinx_rtd_theme#1123 (where it has been fixed and merged, but not released yet).

Possible solutions:

1. Use a prerelease version of the RTD theme.
2. Downgrade to Sphinx 3.x (which is probably why this works for @christophebedard )
3. Remove the line numbers from the example completely

The line numbers are an easy way to refer back to code, but I agree that this is inconsistent with the rest of our tutorials. So I'd be fine with just removing that, though a bunch of the text will need to be rewritten to have code inline rather than "see Line 8" or whatever.

[christophebedard]

This is actually a bug in the Read-the-Docs theme; see readthedocs/sphinx_rtd_theme#1123 (where it has been fixed and merged, but not released yet).

Possible solutions:

1. Use a prerelease version of the RTD theme.
2. Downgrade to Sphinx 3.x (which is probably why this works for @christophebedard )
3. Remove the line numbers from the example completely

Yes, I was using Sphinx 3. I did see that issue (and other related ones) and upgraded to Sphinx 4 and then tried a pre-release version of the RTD theme (1.0.0rc1), but it didn't entirely fix the issue. I couldn't select the line numbers (as expected), but copying using the button incorrectly copied the line numbers: executablebooks/sphinx-copybutton#85

[Aut0R3V]

Hi is anyone working on this? If not so, I would like to get started on this

[cadmus-to]

I'm fairly new to git culture, but I don't think anyone is because no PRs have referenced this issue

[Aut0R3V]

Sure Thanks!
I just went through the code, and I couldn't understand the underlying problem. If you could please tell me what specifically needs to be changed, I can try that.
Thanks!

[clalancette]

It turns out that this was simpler than I thought; #1906 should fix it.