The new file Documentation/orphan/ext4.rst escapes underscores ("\_")
throughout. However, RST doesn't actually require that, so the escaping
only succeeds in making the document less readable. Remove the unneeded
escapes.
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210902220854.198850-3-corbet@lwn.net
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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