fixing broken link in readme

README.md

@@ -3,7 +3,7 @@
 
 ![arbutus logo](https://github.com/mwpennell/arbutus/raw/master/extra/arbutus_logo.png)
 
-This package was developed to assess the adequacy of continuous trait models. The package includes functions to parse the output of various model-fitting functions in R, rescale phylogenies according to fitted parameters, simulate datasets, calculate summary statistics and plot results. The methods is described in a our paper: "Model adequacy and the macroevolution of angiosperm functional traits" published in The American Naturalist (see [link](http://www.jstor.org/stable/full/10.1086/682022); [pdf](http://mwpennell.github.io/pdfs/pennell-amnat-2015.pdf); and [manuscript repo](https://github.com/https://github.com/richfitz/modeladequacy)).
+This package was developed to assess the adequacy of continuous trait models. The package includes functions to parse the output of various model-fitting functions in R, rescale phylogenies according to fitted parameters, simulate datasets, calculate summary statistics and plot results. The methods is described in a our paper: "Model adequacy and the macroevolution of angiosperm functional traits" published in The American Naturalist (see [link](http://www.jstor.org/stable/full/10.1086/682022); [pdf](http://mwpennell.github.io/pdfs/pennell-amnat-2015.pdf); and [manuscript repo](https://github.com/richfitz/modeladequacy)).
 
 ## Installation