HTML formatting issues after updating sphinx

[dp0s]

Problem

I'm hosting the documentation for my python project on readthedocs, there are 2 formatting problems in the following section:

https://dpowers.readthedocs.io/en/latest/reference/power.html#Dpowers.KeyboardAdaptor.key

1st problem: The right margin is not respected (in this section of the documentation only).
2nd problem: (for all sections) The font color of class and method names/arguments is entirely blue, although it should be black (with blue background). Other documentations on readthedocs look fine in my browser. --- similar to #1212

They occured after updating sphinx version to 4.1.2 from 3.4.3 - I can reproduce this locally on my computer.

Reproducible Project

The source folder for the documentation is here:
https://github.com/dp0s/Dpowers/tree/master/docs

Error Logs/Results

Local build on my computer with sphinx 4.1.2

Expected Results

Local build on my computer with sphinx 3.4.3

Environment Info

• Python Version: 3.7
• Sphinx Version: 4.1.2 / 3.4.3
• RTD Theme Version: 0.5.2

Note

I recently introduced the sphinx hoverxref extension, which is still in beta mode. So I rebuilt the docs for an old version of my repository (v0.1.2) without hoverxref extension and the problem is the same.

[dp0s]

Just noticed that the 2nd problem was already reported today in #1212. So it should probably be discussed there.

That leaves the 1st problem concerning the right margin, which seems to be a bug.

[dp0s]

For completeness: I tested building the documentation using the python_docs_theme instead, still in sphinx 4.1.2. There is no margin problem. So it seems specific to sphinx_rtd_theme in combination with the sphinx version.

[stsewd]

Can you test if these problems go away with the version from master? You can also try our pre-release form pypi https://pypi.org/project/sphinx-rtd-theme/1.0.0rc1/

[dp0s]

Thanks for the suggestion, I tried 1.0.0rc1 with sphinx 4.1.2. locally:

As you can see the color problem is fixed already :)

[dp0s]

Regarding the margin problem, I narrowed it down. It is an issue of how the autoclass directive handles the documentation of property objects with long code examples. For demonstration, I added the following example in my project:

class MyTestClass:
    
    
    @property
    def a_property_with_long_code_example(self):
        """
        This is a property with long code example::
        
            print("Some kind of long line to exceed the right margin ---------------------------------------------------------------------------------------------------")
        """
        pass

    
    def a_function_with_long_code_example(self):
        """
        This is a function with long code example::

            print("Some kind of long line to exceed the right margin ---------------------------------------------------------------------------------------------------")
        """
        pass

Now if I build the documentation of the following lines:

.. autoclass:: Dpowers.MyTestClass

.. autodata:: Dpowers.MyTestClass.a_property_with_long_code_example

the result is: