changed grammar of sentence to appease CRAN

DESCRIPTION

@@ -8,7 +8,7 @@ Authors@R: c(
     person("Jared", "Huling", , "jaredhuling@gmail.com", c("aut", "cre"))
     )
 Maintainer: Jared Huling <jaredhuling@gmail.com>
-Description: Contains functions for solving penalized least squares problems using the orthogonalizing EM algorithm of Xiong et al. (2016)<http://dx.doi.org/10.1080/00401706.2015.1054436>. The main fitting function is oem and the functions cv.oem and xval.oem are for cross validation, the latter being an accelerated cross validation function for linear models. The big.oem function allows for out of memory fitting.
+Description: Solves penalized least squares problems using the orthogonalizing EM algorithm of Xiong et al. (2016)<doi:10.1080/00401706.2015.1054436>. The main fitting function is oem() and the functions cv.oem() and xval.oem() are for cross validation, the latter being an accelerated cross validation function for linear models. The big.oem() function allows for out of memory fitting.
 URL: https://github.com/jaredhuling/oem
 BugReports: https://github.com/jaredhuling/oem/issues
 License: GPL (>= 2)