RFR: 8306408: Fix the format of several tables in building.md [v4]

[Dingli Zhang]

On Thu, 20 Apr 2023 00:23:34 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

>> Hi all,
>> 
>> Currently, the format of several tables in building.md looks a little 
>> problematic and will incorrectly display the split line. In contrast, the 
>> corresponding building.html will display the tables correctly.
>> 
>> This patch will only change building.md and the format of the tables 
>> will display correctly.
>> 
>> Please take a look and have some reviews. Thanks a lot.
>
> Dingli Zhang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updated html

May I ask if anyone can sponsor for me? Thanks a lot!

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PR Comment: https://git.openjdk.org/jdk/pull/13523#issuecomment-1538063108