Fix replaceText IOOBE

[Jugen]

This is a fix for #689 ArrayIndexOutOfBoundsException in ParagraphText.getRangeShapeSafely after calling replaceText under certain conditions.

[JordanMartinez]

Thanks for the PR!

[JordanMartinez]

I looked through the Travis CI logs and came across these lines. Is it possible to get rid of them somehow? Or is that necessary in order to run the test due to the diaereses/umlauts and just an unfortunate issue on the Mac JDK?

Also, could the test work without such a long and verbose text that otherwise obscures the issue with a lot of noise? For example, you shared that you were able to reproduce the issue (though perhaps for different reasons) using the texts:

Text A: "1234567890\n\nabcdefghij\n\n1234567890\n\nabcdefghij"
Text B: "1234567890\n\nabcdefghijklmno\n\n1234567890\n\nabcde"

[Jugen]

Yeh, I noticed that in the Travis logs as well and unfortunately I don't know if it's possible to get rid of them. As you surmised, I believe it is necessary for the reasons you mention.

I created two tests, one using the long & verbose text and the other my shorter version - since there is a subtle difference to the way the IOOBE gets triggered in each. I had another look, doing a text comparison between the two long texts and have managed to reduce it down to a much shorter version with the same properties and results as before. :-)

[JordanMartinez]

Ok. It is what it is. I'm going to merge #687 first and then I'd like to merge this one since it'll take me a lot more work to include this one in mine than to include mine in yours.