RFR: 4511638: Double.toString(double) sometimes produces incorrect results [v6]

[zimmermann6]

On Tue, 8 Feb 2022 22:11:34 GMT, Raffaello Giulietti <duke at openjdk.java.net> wrote:

>> Hello,
>> 
>> here's a PR for a patch submitted on March 2020 [1](https://cr.openjdk.java.net/~bpb/4511638/webrev.04/) when Mercurial was a thing.
>> 
>> The patch has been edited to adhere to OpenJDK code conventions about multi-line (block) comments. Nothing in the code proper has changed, except for the addition of redundant but clarifying parentheses in some expressions.
>> 
>> 
>> Greetings
>> Raffaello
>
> Raffaello Giulietti has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 12 commits:
> 
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Adapted hashes in ElementStructureTest.java
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Merge branch 'master' into JDK-4511638
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Enhanced intervals in MathUtils.
>    Updated references to Schubfach v4.
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Merge branch 'master' into JDK-4511638
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Slight adjustments to Javadoc as suggested in the JDK-8202555 (CSR) comments.
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Adjusted hashes in test/langtools/tools/javac/sym/ElementStructureTest.java
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Merge branch 'master' into JDK-4511638
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>  - 4511638: Double.toString(double) sometimes produces incorrect results
>    
>    Refactored test classes to better match OpenJDK conventions.
>    Added tests recommended by Guy Steele and Paul Zimmermann.
>  - Changed MAX_CHARS to static
>  - ... and 2 more: https://git.openjdk.java.net/jdk/compare/92f4f40d...c29dff76

for the record, I post here the review we did with Jean-Michel Muller of the Schubfach algorithm in last October
[review.pdf](https://github.com/openjdk/jdk/files/8471359/review.pdf)

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PR: https://git.openjdk.java.net/jdk/pull/3402