Update rebuttal2.tex

rebuttal2.tex

@@ -42,7 +42,7 @@ \section{Comments from Editor}
 $\sqrt{\cdot}$ is defined to be the square root lying in the right half-plane.
 \begin{solution}
 We reworked the two sentences to clarify the situation. We have added a
-footnote with a formula that works for all complex $t$.
+footnote with the definition of $\sqrt z$ that SymPy uses.
 \end{solution}
 
 \question Page 7, line 186: please state in the text whether this is typed as two lower case letter o's, as opposed to being some special symbol.