Incorrect source dropdowns when a function matches the module's name

[tlgs]

Problem Description

When the name of a function matches the name of the module, View Source panels don't work as intended, i.e. clicking on the function's label will expand the full module's source.

This happens because multiple label elements will be generated with the same id in the for attribute.

Titling this issue was a bit of a doozy, feel free to rename to something more descriptive.

Steps to reproduce the behavior:

$ mkdir foo
$ touch foo/__init__.py
$ echo -e 'class foo:\n    ...\n\nclass bar:\n    ...\n\ndef foo():\n    ...' > foo/foo.py
$ pdoc foo

While coming up with this simple example I must have encountered another bug... 😅
pdoc is seemingly skipping the first class when rendering the module's documentation.

System Information

pdoc: 12.1.0
Python: 3.10.6
Platform: Linux-5.19.3-arch1-1-x86_64-with-glibc2.36