README typo fix.
# PyElastica
-[![Build_status](https://travis-ci.com/GazzolaLab/PyElastica.svg?branch=master)[![codecov](https://codecov.io/gh/GazzolaLab/PyElastica/branch/master/graph/badge.svg)](https://codecov.io/gh/GazzolaLab/PyElastica)[![Documentation Status](https://readthedocs.org/projects/pyelastica/badge/?version=latest)](https://docs.cosseratrods.org/en/latest/?badge=latest)
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PyElastica is the python implementation of **Elastica**, which is a *free* and *open-source* software project for the simulation of assemblies of slender, one-dimensional structures using Cosserat Rod theory. More information about Elastica and Cosserat rod theory is available at the Elastica [project website](https://cosseratrods.org)
