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webp-lossless-bitstream-spec: refine single node text

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Remove the ambiguous 'should' which in other contexts might result in
questions as to whether it is a SHOULD or a MUST.

Change-Id: I9b396187ebde5ea5a0dbaf42daee6acf541258cd
This commit is contained in:
James Zern 2023-06-16 10:59:21 -07:00
parent 64819c7cf3
commit 14a9dbfba0
1 changed files with 3 additions and 3 deletions
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6
doc/webp-lossless-bitstream-spec.txt
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@ -847,9 +847,9 @@ stream. This may be inefficient, but it is allowed by the format.
The described tree must be a complete binary tree. A single leaf node is
considered a complete binary tree and can be encoded using either the simple
code length code or the normal code length code. When coding a single leaf
node using the _normal code length code_, all but one code length should be
zeros, and the single leaf node value is marked with the length of 1 -- even
when no bits are consumed when that single leaf node tree is used.
node using the _normal code length code_, all but one code length are zeros,
and the single leaf node value is marked with the length of 1 -- even when no
bits are consumed when that single leaf node tree is used.
**(i) Simple Code Length Code:**