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Turn off regular expressions in TextBuffer

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When you work with objects of the TextBuffer class they use regular expressions internally when applying operations on the text.

So this example probably wouldn't perform as you'd expect, since "<" is a control character used by the regular expression engine:

textBuffer.replace("<Apples>", "<Cake");

To mitigate this, you can turn off the regular expression engine:

textBuffer.regularExpressions(false);

Mmmmm, cake….

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