Re: [PATCH v2] docs: consolidate human interface subsystems

[kernel test robot <lkp@intel.com>]

Hi Costa,

kernel test robot noticed the following build warnings:

[auto build test WARNING on lwn/docs-next]
[also build test WARNING on linus/master v6.3 next-20230428]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Costa-Shulyupin/docs-consolidate-human-interface-subsystems/20230501-234438
base:   git://git.lwn.net/linux.git docs-next
patch link:    https://lore.kernel.org/r/20230501154258.277866-1-costa.shul%40redhat.com
patch subject: [PATCH v2] docs: consolidate human interface subsystems
reproduce:
        # https://github.com/intel-lab-lkp/linux/commit/2df620e4b9e2c2827f8a5519f6c266e9e5ef85be
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Costa-Shulyupin/docs-consolidate-human-interface-subsystems/20230501-234438
        git checkout 2df620e4b9e2c2827f8a5519f6c266e9e5ef85be
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        make htmldocs

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305021306.dKifEdb7-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> Documentation/subsystem-apis.rst:14: WARNING: Title underline too short.

vim +14 Documentation/subsystem-apis.rst

    12	
    13	Human interfaces
  > 14	---------------
    15	

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