Update README.md

Author: chenxinye

README.md

@@ -91,6 +91,7 @@ The supported floating point arithmetic formats include:
 ```python
 from pychop import LightChop
 from pychop.builtin import CPFloat
+
 a = CPFloat(1.234567, half)
 b = CPFloat(0.987654, half)
 
@@ -349,3 +350,4 @@ If you use ``pychop`` in your research or simulations, cite:
 
 
 
+