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Subject[PATCH] w1: fix build warning in w1_ds2438.rst
commit c999fbbdcf77 ("w1: ds2438: support for writing to offset
register") added more documentation, but had a one-off line for the
header of a section which caused the build warning:

Documentation/w1/slaves/w1_ds2438.rst:56: WARNING: Title underline too short.

Resolve this by fixing the underline to be long enough.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/w1/slaves/w1_ds2438.rst b/Documentation/w1/slaves/w1_ds2438.rst
index 5c5573991351..4fa671fbc93f 100644
--- a/Documentation/w1/slaves/w1_ds2438.rst
+++ b/Documentation/w1/slaves/w1_ds2438.rst
@@ -53,7 +53,7 @@ from the slave device. If it is correct, the 8 bytes page data are passed
to userspace, otherwise an I/O error is returned.

"offset"
--------
+--------
This file controls the 2-byte Offset Register of the chip.
Writing a 2-byte value will change the Offset Register, which changes the
current measurement done by the chip. Changing this register to the two's complement
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