Returns the line at <code>index</code> without delimiters.
<p>
@param index the index of the line to return
@return the logical line text (i.e., without the gap)
@exception IllegalArgumentException <ul>
<li>ERROR_INVALID_ARGUMENT when index is out of range</li>
</ul>
Returns the line at <code>index</code> without delimiters. <p>
@param index the index of the line to return @return the logical line text (i.e., without the gap) @exception IllegalArgumentException <ul> <li>ERROR_INVALID_ARGUMENT when index is out of range</li> </ul>