Update index.rst

docs/sphinx/source/index.rst

@@ -24,8 +24,8 @@ Documentations of PyPop7 for Black-Box Optimization (BBO)
 
 `"Responsible for adaptation, optimization, and innovation in the living world, evolution
 executes a simple algorithm of diversifcation and natural selection, an algorithm that
-works at all levels of complexity from single protein molecules to whole ecosystems.
-"---From Nobel Lecture of Frances H. Arnold in California Institute of Technology
+works at all levels of complexity from single protein molecules to whole ecosystems."---
+From Nobel Lecture of Frances H. Arnold in California Institute of Technology
 <https://www.nobelprize.org/uploads/2018/10/arnold-lecture.pdf>`_
 
 **PyPop7** is a *Pure-PYthon* library of *POPulation-based OPtimization* for single-objective,