fix -Werror issues

Hi Jon,

As pointed by Jani, and previously by Randy, several warnings are currently not considered as errors. The issue is related to changeset 469c1c9eb6c9 ("kernel-doc: Issue warnings that were silently discarded"), which was using directly a low-level interface.

Patch 1 fix that.
Patch 2 fixes a related issue: when there are more than 255 errors, the return code with -Werror can be 0 even on errors, because of glibc behavior: programs can only use 8 bits for error codes.

Patches 3 and 4 are not directly related, and touches only on comments inside python-doc.py script itself:

- patch 3 is just a coding style change to match the comment style we agreed;

- patch 4 fixes some English issues on comments. The issues were pointed by LLM, which was used as any other spelling
tool: I picked just the relevant changes, ignoring the ones that were false positives. I also didn't agree with one of the changes, replacing it by something else.

I wrote it more as an experiment about how to properly use LLM. IMO, it could be useful to use LLM to review spelling on docs, provided that the one using the tool will filter out LLM-generated trash - just like one does when using any other spelling tool. Yet, based on Jani feedback, extra care is needed with regards to LLM abuse of UTF-8 chars.

---

v5:
- fixed some kernel-doc docstrings on patch 2 and 4.

v4:
- improved description on patch 4;
- fixed some typos and problems at patch2 comments;
- fixed a potential sphinx.ext.autodoc issue.

v3:
- did some cleanups at patch 1, placing the code on a new

    function;

- removed extra blank line after comments

v2:
- on patch 2, I changed the -Werror return code to "3". This

    way, it is easier for a script to identify what happened;

- removed UTF-8 unbreakable whitespaces from patch 4. Heh, it seems that LLM-produced stuff can suffer with unwanted UTF-8 chars... On one of the strings it replaced 0x20 with 0xa0...

Mauro Carvalho Chehab (4):
scripts/kernel-doc: fix logic to handle unissued warnings scripts/kernel-doc: avoid error_count overflows scripts/kernel-doc: ensure that comments are using our coding style scripts/kernel-doc: some fixes to kernel-doc comments

 scripts/kernel-doc.py                | 79 ++++++++++++++++++----------
 tools/lib/python/kdoc/kdoc_parser.py | 35 +++++++++---
 2 files changed, 78 insertions(+), 36 deletions(-)

2.52.0