scripts/kernel-doc.py: output warnings the same way as kerneldoc

Add a formatter to logging to produce outputs in a similar way
to kernel-doc. This should help making it more compatible with
existing scripts.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/559f0ad9e6fecfcbb3cc38b6097463bd38d58629.1744106241.git.mchehab+huawei@kernel.org

scripts/kernel-doc.py

@@ -2715,6 +2715,11 @@ neither here nor at the original Perl script.
 """
 
 
+class MsgFormatter(logging.Formatter):
+    def format(self, record):
+        record.levelname = record.levelname.capitalize()
+        return logging.Formatter.format(self, record)
+
 def main():
     """Main program"""
 
@@ -2799,10 +2804,19 @@ def main():
         args.wshort_desc = True
         args.wcontents_before_sections = True
 
+    logger = logging.getLogger()
+
     if not args.debug:
-        level = logging.INFO
+        logger.setLevel(logging.INFO)
     else:
-        level = logging.DEBUG
+        logger.setLevel(logging.DEBUG)
+
+    formatter = MsgFormatter('%(levelname)s: %(message)s')
+
+    handler = logging.StreamHandler()
+    handler.setFormatter(formatter)
+
+    logger.addHandler(handler)
 
     if args.man:
         out_style = ManFormat()
@@ -2811,8 +2825,6 @@ def main():
     else:
         out_style = RestFormat()
 
-    logging.basicConfig(level=level, format="%(levelname)s: %(message)s")
-
     kfiles = KernelFiles(files=args.files, verbose=args.verbose,
                          out_style=out_style, werror=args.werror,
                          wreturn=args.wreturn, wshort_desc=args.wshort_desc,