fix a few more arxiv links for CRAN (https instead of http)

Author: jgabry

vignettes/large-data.Rmd

@@ -613,4 +613,4 @@ Computing_. 27(5), 1413--1432. \doi:10.1007/s11222-016-9696-4.
 
 Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto
 smoothed importance sampling.
-[arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+[arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).

vignettes/loo-package.Rmd

@@ -298,4 +298,4 @@ Computing_. 27(5), 1413--1432. \doi:10.1007/s11222-016-9696-4.
 [online](https://link.springer.com/article/10.1007/s11222-016-9696-4), 
 [arXiv preprint arXiv:1507.04544](https://arxiv.org/abs/1507.04544).
 
-Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).

vignettes/moment-matching.Rmd

@@ -45,7 +45,7 @@ papers
 
 * Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). 
 Pareto smoothed importance sampling. 
-[arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+[arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).
 
 # Example: Eradication of Roaches
 
@@ -317,4 +317,4 @@ Implicitly Adaptive Importance Sampling.
 
 Vehtari, A., Gelman, A., and Gabry, J. (2017). Practical Bayesian model evaluation using leave-one-out cross-validation and WAIC. _Statistics and Computing_. 27(5), 1413--1432. \doi:10.1007/s11222-016-9696-4. Links: [published](https://link.springer.com/article/10.1007/s11222-016-9696-4) | [arXiv preprint](https://arxiv.org/abs/1507.04544).
 
-Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).

vignettes/weights.Rmd

@@ -366,7 +366,7 @@ Computing_. 27(5), 1413--1432. \doi:10.1007/s11222-016-9696-4.
 [online](https://link.springer.com/article/10.1007/s11222-016-9696-4), 
 [arXiv preprint arXiv:1507.04544](https://arxiv.org/abs/1507.04544).
 
-Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto smoothed importance sampling. [arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).
 
 Yao, Y., Vehtari, A., Simpson, D., and Gelman, A. (2018). Using
 stacking to average Bayesian predictive distributions. In Bayesian

vignettes/writing-stan-programs.Rmd

@@ -228,4 +228,4 @@ Computing_. 27(5), 1413--1432. \doi:10.1007/s11222-016-9696-4.
 
 Vehtari, A., Simpson, D., Gelman, A., Yao, Y., and Gabry, J. (2019). Pareto
 smoothed importance sampling.
-[arXiv preprint arXiv:1507.02646](http://arxiv.org/abs/1507.02646).
+[arXiv preprint arXiv:1507.02646](https://arxiv.org/abs/1507.02646).