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https://issues.apache.org/jira/browse/NETBEANS-3973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17098097#comment-17098097
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Michel Graciano commented on NETBEANS-3973:
-------------------------------------------
I am investigating this issue and just found a workaround. If you disable 'Wrap
After Lambda Arrow' it works as expected.
!image-2020-05-02-17-52-49-898.png!
> Code auto formatting for lambda arrows
> --------------------------------------
>
> Key: NETBEANS-3973
> URL: https://issues.apache.org/jira/browse/NETBEANS-3973
> Project: NetBeans
> Issue Type: Bug
> Components: java - Editor
> Affects Versions: 11.3
> Environment: Arch Linux and the included "jdk11-openjdk" package,
> official NB 11.3 bin download
> Reporter: Bernd Michaely
> Priority: Major
> Attachments: image-2020-05-02-17-52-49-898.png
>
>
> Since NB 11.3, code auto formatting for lambda errors is broken. NB adds an
> additional space before the lambda arrow. To reproduce the problem choose
> Menu Tools -> Options -> Editor -> Formatting ->
> Language: Java
> Category: Wrapping ->
> - "Lambda Arrow" : Never
> - Check "Wrap After Lambda Arrow"
> Category: Spaces -> Around Operators
> -> "Lambda Arrow" unchecked:
> {{11.2: BinaryOperator plus = (a, b)->a+b;}}
> {{11.3: BinaryOperator plus = (a, b)_->a+b;}}{{}}
> -> or "Lambda Arrow" checked:
> {{11.2: BinaryOperator plus = (a, b) -> a+b;}}
> {{11.2: BinaryOperator plus = (a, b)_ -> a+b;}}{{}}
> ... the underscore chars indicating the additional space char.
> Note, that the additional space only appears, if "Wrap After Lambda Arrow" is
> checked.
> (This problem causes a lot of noise in Diff and VCS for existing code, so
> this is pretty annoying and currently prevents me from upgrading to NB 11.3)
>
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