RFR: 8366201: RichTextArea: remove allowUndo parameter [v11]

[Andy Goryachev]

On Thu, 6 Nov 2025 13:23:01 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

>> Andy Goryachev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   javadoc
>
> modules/jfx.incubator.richtext/src/main/java/jfx/incubator/scene/control/richtext/RichTextArea.java line 103:
> 
>> 101:  *   // build the content
>> 102:  *   textArea.setUndoRedoEnabled(false);
>> 103:  *   textArea.appendText("RichTextArea\n", heading, false);
> 
> We don't pass any per method undo/redo flag as argument in appendText.
> This needs to be updated.

good catch!  these code blocks are not checked by the `javadoc` tool.

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PR Review Comment: https://git.openjdk.org/jfx/pull/1941#discussion_r2499499082