linux-next: build warning after merge of the spi tree

[Stephen Rothwell]

Hi all,

After merging the spi tree, today's linux-next build (htmldocs) produced
this warning:

Documentation/spi/spi-summary.rst:274: WARNING: Title underline too short.

Declare target Devices
^^^^^^^^^^^^^^^^^^^^^

Introduced by commit

  99769a52464d ("spi: Update the "master/slave" terminology in documentation")

-- 
Cheers,
Stephen Rothwell

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