Remove a checkme

[xfq]

https://w3c.github.io/clreq/#id69

Current text:

In principle, if numbers are arranged horizontally in a vertical writing mode, the width of the numbers should not exceed 1 em. This rule originated in the letterpress printing era due to the fixed width of each line. Therefore, in vertical writing mode, Western text or European numerals are not limited to two digits, but the width should not exceed 1 em. Some commonly seen examples include "3.0", "A+" and "2B".

Suggestion from @r12a:

In principle, if numbers are arranged horizontally in vertical writing mode the total width of the numbers together should not exceed 1 em. This rule originated in the letterpress printing era due to the fixed width of each line. The horizontal text may include more than two characters, but the overall width should not exceed 1 em. Some commonly seen examples include “3.0”, “A+” and “2B”.

Another comment: jlreq mentions that font glyphs can be squeezed to fit more in, and the limit is usually 4 characters. clreq doesn't mention this currently.

[xfq]

Related discussions:

• https://www.w3.org/2023/09/05-clreq-minutes.html#t06
• https://www.w3.org/2023/12/14-clreq-minutes.html#t01

[xfq]

Note that the new version of the text has removed the mention of "Western text or European numerals". Should we also adjust the Chinese version?

[ethantw]

會議中 @bobbytung 建議的修改：

保持正常方向，橫排處理（如日文的縱中橫排）。

活字印刷時代，為了保持寬度一至，原則上僅應用在二到三位數字，排列上不超過一個漢字字幅。

但隨數位排版技術進步，排列不限於數字，會有西文字母、符號與阿拉伯數字混排的狀況；排列時寬度也可以大於一個字的字幅，凸出到行間。常見的用法包括[3.0]、[A+]、[2B]等。

由於行文涉及寬高的用語問題，依 #472 的討論，我調整了部分用字，

保持正常方向，橫排處理（如日文的縱中橫排）。

活字印刷時代，為了保持各行行高一致，原則上縱中橫排僅應用於二到三位數字，排列上不超過一個漢字的大小。

但隨數位排版技術進步，排列不限於數字，會有西文字母、符號與阿拉伯數字混排的狀況；排列時也可以大於一個字的大小，凸出到行間。常見的用法包括[3.0]、[A+]、[2B]等。