RFR: 8276966: Improve diagnostic output for the mismatching parts of a hybrid snippet [v2]

[Hannes Wallnöfer]

On Fri, 3 Oct 2025 14:45:19 GMT, Hannes Wallnöfer <hannesw at openjdk.org> wrote:

>> Please review a trivial change to improve the error output for hybrid snippets with mismatching inline and external snippet text.
>> 
>> Since the logging code drops trailing blank lines, differences in trailing whitespace were not displayed properly. See [JDK-8304408](https://bugs.openjdk.org/browse/JDK-8304408) for an example where this occurs. By adding a terminal separator we make sure trailing blank lines are not discarded. This makes it also easier to see where the snippet diff ends. 
>> 
>> Old output:
>> 
>> 
>>   ----------------- inline -------------------
>>   inline snippet
>>   ----------------- external -----------------
>>   external snippet
>> 
>> 
>> New output:
>> 
>> 
>>   ----------------- inline -------------------
>>   inline snippet
>>   ----------------- external -----------------
>>   external snippet
>>   --------------------------------------------
>
> Hannes Wallnöfer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add test

Thanks, Pavel!

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PR Comment: https://git.openjdk.org/jdk/pull/27621#issuecomment-3366259872