Update manifest of core.output2 to separate the OpenIDE-Module-Provides values with comma

[YannLeCorse]

In a Netbeans application based on Maven, the nbm-maven-plugin is failing with the following message while both modules are explicitly part of the application.

[ERROR] Some tokens required by included modules are not provided by included modules. The application will fail starting up. The missing tokens are:
[ERROR]    org.openide.windows.IOProvider          ref: [org.netbeans.modules.css.visual]

Looking at the ExamineManifest source code the nbm-maven-plugin is expecting to find comma separated values.

Looking at the other Manifest on Netbeans source code, it seems that other are comma separated already

• ide/xml.xdm/manifest.mf
• ide/projectui/manifest.mf
• webcommon/libs.graaljs/manifest.mf
• Etc.

Thus core.output2 seems to have a typo addressed by this pull request.

[mbien]

thanks! makes sense to me. enabled all tests to check if fixing the manifest has any side effects.

[mbien]

i checked and can confirm that all other cases use a comma as separator.

src/org/netbeans/core/output2/NbIOProvider.java is also implementing both providers

all tests green -> merging

@YannLeCorse thanks for fixing this!

[YannLeCorse]

@YannLeCorse thanks for fixing this!

My one character contribution pleasure.