[cp-patches] fixing the JTextArea.replaceRange

[Meskauskas Audrius]

The Mauve test gnu.testlet.javax.swing.JTextArea.text indicates the 
incorrect work of the text replacement methods in JTextArea. For example, if 
the string is "0123456789", the replaceRange(3,5, "replacement") should 
result the "012replacement56789" and surely not "012replacement89" as it 
does.

The problem was that the author of the replaceRange method have 
misinterpreted the meaning of the second parameter in the doc.remove(int, 
int). This is the length of the segment being removed and not the absolute 
bound of the range being removed.

The problem can be esily fixed by correcting this method.

Audrius Meskauskas

JTextArea.java.diff
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