docs: rbtree.txt: fix Sphinx build warnings
authorMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Tue, 16 Apr 2019 02:00:35 +0000 (23:00 -0300)
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Mon, 15 Jul 2019 12:20:24 +0000 (09:20 -0300)
commiteaf5211d8c00060a3b41a031a762c906d3603098
tree657bab3210caab6403be75cbb5d149d163b3e25b
parent1945a035540e2cef0362a2e7e828f8cf547e86b8
docs: rbtree.txt: fix Sphinx build warnings

Ths file is already at ReST format. Yet, some recent changes
made it to produce a few warnings when building it with
Sphinx.

Those are trivially fixed by marking some literal blocks.

Fix them before adding it to the docs building system.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Documentation/rbtree.txt