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While double-checking the downloadability of my NBM's I found that the semantics of the ProjectProperties->Display->LongDescription field/property are inadequately presented to the user. I initially typed in text exactly like this: Try "Run->Shell Term" to get a shell window within NetBeans. Try "Run->Command Term" to run an arbitrary command within NetBeans. "Window->Output->Terminal" will bring back closed terminal windows. After creation the NBM and going through aninstallprocess, it came out, in the PluginDescription section, all as one paragraph. I made a wild guess that this may take HTML and put in<br>'s. Sure enough it took it in. I shouldn't have to make wild guesses. A " (HTML)" after the "Long Description:" label in the ProjectProperties dialog would've helped a lot.
Reassigning to apisupport.
You could integrate SHEF as Geertjan described in this recent blog entry [1]. [1] https://blogs.oracle.com/geertjan/entry/wysiwyg_editor_for_java_desktop