When selecting a portion of text in Aptana Studio (I assume the same is true for Eclipse in general) like so:

And then typing a single quotation mark ("), it will result in this:
But what I want is this:

Or even better:

Please note, I really like automatic closing of parenthesis/quotation marks/braces/…, I just want to affect the behavior when text is selected.
In Aptana Studio 3:
Window > Preferences > Aptana Studio > Editors > Disable “Wrap selected text with matching characters”
This helped me find the solution: https://aptanastudio.tenderapp.com/discussions/questions/1122-disable-automatically-closing-quotes